Article
Optics
Julia R. D'Rozario, Stephen J. Polly, George T. Nelson, David Wilt, Seth M. Hubbard
Summary: This study highlights the significance of considering free-carrier absorption (FCA) in non-active layers for the design and efficiency improvement of ultrathin III-V solar cells with light trapping structures. Optical modeling shows that FCA can cause parasitic losses and reduce the current and voltage output of the solar cells.
Article
Optics
Benedikt Blaesi, Mario Hanser, Klaus Jaeger, Oliver Hoehn
Summary: Solar cells can enhance light trapping efficiency by utilizing gratings. We present an analytical model to optimize the grating period and provide guidelines for maximizing light trapping in high-end solar cells.
Article
Optics
Lin Zhu, Yongtao Wang, Xu Pan, Hidefumi Akiyama
Summary: This study presents a formula for absorptance of all subcells in an N-junction solar cell with ideal front texture and perfect rear mirror, which is then applied to InGaP/GaAs/InGaAs triple-junction solar cells. The results show that front-textured triple-junction solar cells can significantly enhance light absorption, with the top subcell thickness reduced by over 28%. Additionally, front texturization has greater potential for material cut-down compared to rear texturization.
Article
Mathematics, Applied
E. Seim, A. Kohler, R. Lukacs, M. A. Brandsrud, E. S. Marstein, E. Olsen, R. Blumel
Summary: The research team maximizes absorption by trapping light rays in chaotic scattering systems and proposes the use of an autocorrelation function to assess the average path length of rays as a possible experimental method to verify light-trapping efficiency.
Article
Physics, Applied
Oluwatobi Olorunsola, Abdulla Said, Solomon Ojo, Grey Abernathy, Samir Saha, Emmanuel Wangila, Joshua Grant, Hryhorii Stanchu, Sudip Acharya, Wei Du, Yue-Tong Jheng, Guo-En Chang, Baohua Li, Gregory Salamo, Shui-Qing Yu
Summary: Inserting an additional GeSn barrier between the GeSn well and SiGeSn barrier can significantly improve carrier collection efficiency.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Physics, Applied
Mengxin Xu, Hejian Zhou, Long Chen, Yanlong Meng, Wenli Lv, Letian Zhang, Shihao Liu, Wenfa Xie
Summary: Although organic light-emitting devices (OLEDs) can achieve high internal quantum efficiency, their external quantum efficiency is limited due to low outcoupling efficiency. Investigating the distribution of excitons is crucial for optimizing device structure and enhancing outcoupling efficiency. In this study, we propose a probe method using an ultrathin near-infrared material to analyze exciton distribution in OLEDs. Our results demonstrate the effectiveness of this probe method for investigating exciton distribution in OLEDs with different emitting layer compositions.
APPLIED PHYSICS LETTERS
(2023)
Article
Optics
Evgeniia Slivina, Derk Baetzner, Raphael Schmager, Malte Langenhorst, Jonathan Lehr, Ulrich W. Paetzold, Uli Lemmer, Carsten Rockstuhl
Summary: This study analyzes the increase in annual energy yield of relatively thin heterojunction solar module architectures when optimized anti-reflective and light trapping titanium dioxide nanodisk square arrays are applied. The numerical study shows significant relative improvements in energy yield when reducing the silicon wafer thickness and using these nanostructures.
Article
Chemistry, Multidisciplinary
Hiroyuki Yamada, Junpei Watanabe, Kazuhiro Nemoto, Hong-Tao Sun, Naoto Shirahata
Summary: Despite bulk crystals of silicon being indirect bandgap semiconductors, the quantum dots derived from silicon exhibit superior photoluminescence properties. The use of SiQDs as an emissive layer in current-driven LEDs allows for strong electroluminescence. The external quantum efficiency of Si-QLEDs was enhanced through postproduction effect.
Article
Materials Science, Multidisciplinary
Shibi Varku, Kumar Prasannajit Pradhan, Soumyaranjan Routray
Summary: In recent times, research communities have been focusing on developing low-cost solar energy harvesting devices. Copper-based quaternary chalcogenides are among the leading materials in this field. This study investigates the electrical and optical performance of quantum well embedded Cu2-Fe-Sn-S4 (CFTS) solar cells, specifically looking into multiple quantum wells (MQWs) with different bandgaps for wider photon absorption of the solar spectrum. The study discusses various electrical and optical parameters, such as power conversion efficiency and quantum efficiency, along with their dependence on carrier quantization.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Jing Li, Bintong Huang, Yuanhao Wang, Aijia Li, Yong Wang, Yangyang Pan, Jia Chai, Ze Liu, Yueming Zhai
Summary: The single-molecule technique for investigating unlabeled proteins in solution is challenging, but nanopore sensing offers a label-free tool for collecting structural information. This study developed a reliable method to convert a silicon nitride nanopore into a stable nanonet platform for single-entity sensing. The nanonet provides more structural information and captures the UV-light-induced structural-change process of individual proteins.
ADVANCED MATERIALS
(2023)
Article
Optics
Yiwei Cao, Quanjiang Lv, Tianpeng Yang, Tingting Mi, Xiaowen Wang, Wei Liu, Junlin Liu
Summary: High-efficiency 278 nm AlGaN-based deep-ultraviolet light-emitting diodes (DUV-LEDs) with a bidirectional-staircase-barrier (BSB) structure were studied. The experimental results showed that the proposed BSB structure achieved a maximum external quantum efficiency (EQE) of 8.47% and a wall-plug efficiency (WPE) of 7.01%. Compared to the reference structure, the EQE and WPE were improved by 32% and 31%, respectively. Numerical simulations demonstrated that the BSB structure enhanced electron confinement, improved hole injection, and increased hole concentration in the active region by 170%. The BSB structure also improved the radiative recombination rate and quantum efficiency of the DUV-LEDs.
JOURNAL OF LUMINESCENCE
(2023)
Article
Energy & Fuels
N. Dasilva-Villanueva, B. Arikan, H. H. Canar, D. Fuertes Marron, B. Hong, A. E. Kececi, S. K. Butuner, G. Bektas, R. Turan, C. del Canizo
Summary: The study investigates the potential efficiency of solar cells based on high-quality multicrystalline Upgraded Metallurgical Grade Silicon (UMG-Si) and explores the adoption of high-efficiency cell architectures. Results show that with optimized passivating layer configurations, UMG-Si wafers can achieve high carrier lifetimes and implied open circuit voltages, demonstrating the suitability of the material for high-efficiency cells.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Optics
Samia Ahmed Nadi, Karsten Bittkau, Florian Lentz, Kaining Ding, Uwe Rau
Summary: The Hutong and VOSTBAT structures exhibit high photocurrent densities in thin silicon heterojunction solar cells, surpassing the traditional Lambertian reference values.
Article
Optics
Xiwen Zhang, Sajeev John
Summary: The study addresses the issue of insufficient photogeneration in the visible range for wide-band photocatalysts like TiO2 and proposes enhancing photocatalytic efficiency through photonic crystal structures. By optimizing different photocatalyst structures, it was found that slanted conical-pore (scPore) showed the best visible light harvesting capability for weakly absorbing TiO2 when the photonic crystal thickness is fixed.
Article
Multidisciplinary Sciences
Yunfeng Chen, Congwei Tan, Zhen Wang, Jinshui Miao, Xun Ge, Tiange Zhao, Kecai Liao, Haonan Ge, Yang Wang, Fang Wang, Yi Zhou, Peng Wang, Xiaohao Zhou, Chongxin Shan, Hailin Peng, Weida Hu
Summary: High quantum efficiency was achieved in 2D black phosphorus (BP)/Bi2O2Se van der Waals (vdW) photodetectors by utilizing momentum-matching and band-alignment heterostructures. Optimization of photocarrier generation, suppression of recombination, and improvement of photocarrier collection contributed to the significantly improved quantum efficiency.
Article
Chemistry, Multidisciplinary
Bohao Yu, Fei Tang, Yuzhao Yang, Jincheng Huang, Shaohang Wu, Feiping Lu, Weiyuan Duan, Andreas Lambertz, Kaining Ding, Yaohua Mai
Summary: Atomic layer deposition (ALD) is an attractive technology for preparing sputtering buffer layers in semi-transparent perovskite solar cells (PSCs) and tandem solar cells. The ALD process can result in pin-hole layers due to island growth when the substrate is unreactive with the ALD reactants, which adversely affects anti-sputtering. In this study, ALD SnOx was used as the sputtering buffer layer in p-i-n structured PSCs, and impermeable ALD layers were formed by activating the unreactive substrate PCBM. The authors successfully fabricated ST-PSCs and perovskite/silicon tandem solar cells with high power conversion efficiencies (PCEs), as well as demonstrated the long-term stability of the devices.
ADVANCED MATERIALS
(2023)
Article
Energy & Fuels
Christian Utama, Christian Meske, Johannes Schneider, Rutger Schlatmann, Carolin Ulbrich
Summary: Faults in photovoltaic arrays can result in significant energy losses. Machine learning models, particularly artificial neural networks, have been developed to automatically detect and diagnose these faults. However, their black-box nature limits user interpretation. This study implements explainable artificial intelligence techniques to shed light on model behavior for photovoltaic fault detection, demonstrating the usefulness of SHAP explanations in generating valuable insights and increasing user trust.
Review
Chemistry, Physical
Osbel Almora, Derya Baran, Guillermo C. Bazan, Carlos I. Cabrera, Sule Erten-Ela, Karen Forberich, Fei Guo, Jens Hauch, Anita W. Y. Ho-Baillie, T. Jesper Jacobsson, Rene A. J. Janssen, Thomas Kirchartz, Nikos Kopidakis, Maria A. Loi, Richard R. Lunt, Xavier Mathew, Michael D. McGehee, Jie Min, David B. Mitzi, Mohammad K. Nazeeruddin, Jenny Nelson, Ana F. Nogueira, Ulrich W. Paetzold, Barry P. Rand, Uwe Rau, Henry J. Snaith, Eva Unger, Lidice Vaillant-Roca, Chenchen Yang, Hin-Lap Yip, Christoph J. Brabec
Summary: This article summarizes the best achievements in the performance of emerging photovoltaic devices in various research subjects, as reported in peer-reviewed articles since August 2021. The article provides updated graphs, tables, and analyses of performance parameters, and compares them based on the photovoltaic bandgap energy and average visible transmittance. The scope of the report is expanded to include triple junction solar cells.
ADVANCED ENERGY MATERIALS
(2023)
Article
Energy & Fuels
Habtamu Tsegaye Gebrewold, Karsten Bittkau, Kaifu Qiu, Uwe Rau, Kaining Ding
Summary: The potential performance of silicon heterojunction solar cells with transparent passivating contact (TPC) at the front side is investigated. An electro-optical device model is developed to understand and analyze the cells. The influences of contact layer thicknesses and other properties on device performance are studied, and algorithm-based optimization is performed. Potential improvements in optical performance and power conversion efficiency are found, and optimizing carrier transport at the rear side shows potential for achieving high conversion efficiency.
Article
Energy & Fuels
Sergey Shcherbachenko, Oleksandr Astakhov, Ugochi Chime, Li-Chung Kin, Kaining Ding, Bart Pieters, Uwe Rau, Egbert Figgemeier, Tsvetelina Merdzhanova
Summary: This study investigates the feasibility of using direct PV-to-battery coupling as an alternative to MPPT under realistic conditions, demonstrating stable high power matching under different irradiance, temperature, and battery state of charge. The results show that direct coupling can achieve power coupling efficiencies above 90% for a wide range of load power, making it a feasible option for various practical applications.
Article
Chemistry, Multidisciplinary
Xabier Rodriguez-Martinez, Paula Hartnagel, Sergi Riera-Galindo, Gulzada Beket, Thomas Osterberg, Feng Gao, Thomas Kirchartz, Olle Inganas
Summary: Non-fullerene acceptors have revolutionized indoor organic photovoltaics with high power conversion efficiencies, but transferring this performance to larger-scale prototyping remains challenging. The PM6:IO4Cl blend, a successful indoor OPV photoactive layer, is investigated for its industrial potential, and the thick and semitransparent devices are fabricated in air. Anomalous current-voltage characteristics are observed, with the cathode side generally outperforming the anode side due to a dead layer at the PAL/anode contact interface. Symmetric J-V curves and improved light utilization efficiency are achieved by making the PALs thin enough. Certain all-polymer and polymer:fullerene blends are identified as suitable candidates for thick device up-scaling, and ternary blends show potential in mitigating electrical asymmetry.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Physics, Applied
G. A. Farias-Basulto, C. Ulbrich, R. Schlatmann, R. Klenk
Summary: This paper presents the use of multiple linear regressions (MLR) to assess the stability and performance of photovoltaic (PV) modules. The MLR method condenses large amounts of data gathered over time into a few predictors, allowing for the comparison of jV parameters under infrequently encountered conditions. The results show that the MLR method is able to accurately reproduce the original input parameters and provide reliable monthly parameter averages.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Paula Hartnagel, Sandheep Ravishankar, Benjamin Klingebiel, Oliver Thimm, Thomas Kirchartz
Summary: In the past years, high-performance organic solar cells have emerged, reducing the amount of energetic disorder in structurally disordered semiconductors. It is crucial to accurately characterize this disorder when searching for future high-efficiency material systems. Common techniques include optical excitation and external voltage measurements, with the former yielding lower values of energetic disorder compared to the latter. Electrical measurements probe different energy ranges than optical measurements due to subband-gap density of states. Limitations and discrepancies between measurement techniques are explained based on electronic parameters.
ADVANCED ENERGY MATERIALS
(2023)
Article
Physics, Multidisciplinary
Mario Zinsser, Tim Helder, Theresa Magorian Friedlmeier, Andreas Bauer, Thomas Kirchartz, Uwe Rau, Rolf Waechter, Michael Powalla
Summary: Precise modeling of solar cell devices is crucial for optimizing and improving future technologies. The authors present a verified numerical model that can analyze losses and predict energy yield of thin film solar cells. The holistic simulation approach includes various physical levels and allows for accurate predictions and analysis of module behavior.
COMMUNICATIONS PHYSICS
(2023)
Article
Energy & Fuels
Paolo Graniero, Mark Khenkin, Hans Koebler, Noor Titan Putri Hartono, Rutger Schlatmann, Antonio Abate, Eva Unger, T. Jesper Jacobsson, Carolin Ulbrich
Summary: Perovskite solar cells are a promising emerging photovoltaic technology that has attracted the attention of researchers worldwide. The stability of these cells is a key challenge, and extensive data has been accumulated in recent years. By analyzing databases and using machine learning techniques, factors affecting cell stability have been identified and the importance of reporting complete experimental information has been highlighted. Additionally, the choice of stability metrics for aging experiments is crucial for future databases.
FRONTIERS IN ENERGY RESEARCH
(2023)
Article
Energy & Fuels
T. S. Vaas, B. E. Pieters, T. Magorian Friedlmeier, A. Gerber, U. Rau
Summary: This article introduces a method of extrapolating module performance in various climates based on cell performance measured under different conditions. By using standardized climatic data, the expected annual yield on module level can be quickly determined, allowing for the assessment of potential yield improvements through cell optimizations.
IEEE JOURNAL OF PHOTOVOLTAICS
(2023)
Article
Chemistry, Physical
Dana Luebke, Paula Hartnagel, Markus Huelsbeck, Thomas Kirchartz
Summary: The adjustable band gap of molecular semiconductors is advantageous for indoor light harvesting. However, challenges such as processability in nonhalogenated solvents, high thicknesses, and high efficiencies at low illuminances exist. This study developed new methods to identify performance losses based on current density-voltage measurements and fabricated solar cells using a specific blend and solvent. The analysis revealed the importance of shunt resistances and trap-assisted recombination in achieving high photovoltaic performance.
Article
Chemistry, Multidisciplinary
Mark Khenkin, Hans Koebler, Marko Remec, Rajarshi Roy, Ulas Erdil, Jinzhao Li, Nga Phung, Ghefar Adwan, Gopinath Paramasivam, Quiterie Emery, Eva Unger, Rutger Schlatmann, Carolin Ulbrich, Antonio Abate
Summary: Forecasting the stability of perovskite solar cells in real-world conditions is a challenge for commercialization. Indoor accelerated tests lack outdoor data and struggle to correlate with the cyclic performance changes of PSCs over the day-night cycle.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Energy & Fuels
Guillermo A. Farias-Basulto, Miguel A. Sevillano-Bendezu, Maximilian Riedel, Mark Khenkin, Jan A. Tofflinger, Rutger Schlatmann, Reiner Klenk, Carolin Ulbrich
Summary: This study investigates the impact of solar spectra variations on the performance of solar cells. The analysis of one year of sun spectra measured at different angles in central Europe reveals the presence of red-shifted solar spectra in vertical installations, which significantly affects the current-mismatch losses in tandem devices.
Article
Energy & Fuels
Shahriyar Safat Dipta, Md Habibur Rahaman, Walia Binte Tarique, Ashraful Hossain Howlader, Ayush Pratik, John A. Stride, Ashraf Uddin
Summary: Implementing a double-sided passivation approach can enhance the performance of n-i-p structured PSCs and improve the stability and photovoltaic properties of the cells.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Daniel Ourinson, Andreas Brand, Andreas Lorenz, Marwan Dhamrin, Sebastian Tepner, Michael Linse, Nathalie Goettlicher, Kosuke Tsuji, Jonas D. Huyeng, Florian Clement
Summary: This work presents two approaches to reduce the amount of silver on the rear side of M2-sized industrial iTOPCon solar cells. The Cu-based approach shows promise with similar power conversion efficiency compared to the conventional approach, while the Al-based approach exhibits some limitations but demonstrates the potential of such type of contact for iTOPCon solar cells.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Abasifreke Ebong, Donald Intal, Sandra Huneycutt, Thad Druffel, Ruvini Dharmadasa, Kevin Elmer, Apolo Nambo
Summary: This study demonstrates the successful metallization of a PERC silicon solar cell using screen-printable copper (Cu) paste. The Cu paste contains antioxidant additives and diffusion inhibitors to prevent oxidation and diffusion of Cu. The Cu-printed cells achieved an efficiency of 19% and showed no Cu diffusion after characterization tests. The long-term stability and effectiveness of the Cu diffusion barrier were also confirmed.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Senami Zogbo, Wilfried Favre, Olivier Bonino, Marie-Estelle Gueunier-Farret
Summary: Measuring specific contact resistivity (pc) is crucial for interface engineering in high efficiency solar cells. The Transfer Length Method (TLM) is commonly used for evaluating layer sheet resistance (Rsheet) and pc, but it is not suitable for metal/Transparent Conductive Oxide (TCO) interface evaluation in silicon heterojunction (SHJ) cells. This study investigates the parameters that restrict current confinement within the TCO, including mid-gap trap density (Dit) at the a-Si:H/c-Si interface and the activation energy (Ea = Ec - EF) variation of a-Si:H contact layers.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Jean-Baptiste Charpentier, Philippe Voarino, Julien Gaume
Summary: The phenomenon of ribbon lengthening in PV modules exposed to thermal cycling is not well explained in the literature. In this study, a three layers model is proposed to explain this effect, and the predictions of the model are validated through finite element method simulations and experiments. The results show that the model predictions are consistent with the indirect measurements, but not with the direct measurements. Additionally, it is inferred that the encapsulant plays a role after the solder failure.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Jean-Baptiste Charpentier, Philippe Voarino, Julien Gaume
Summary: This study investigates the problematic ribbon lengthening observed in PV modules exposed to high amplitude thermal cycling. A simplified system model is proposed and accurate predictions are obtained using the Finite Element Method. The results show that the thickness of the encapsulant has a substantial impact on the lengthening of the ribbons.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
S. Catalan-Gomez, E. Martinez Castellano, M. Schwarz, M. Montes Bajo, L. Dorado Vargas, A. Gonzalo, A. Redondo-Cubero, A. Gallego Carro, A. Hierro, J. M. Ulloa
Summary: This study investigates the use of core-shell gallium nanoparticles as functional light scatterers on solar cells. By optimizing the nanoparticle size, the short-circuit current of the solar cells is significantly improved. The underlying physical mechanism is studied through optical measurements and simulations, and a method to reduce the plasmonic effect of the nanoparticles is demonstrated.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
M. Gamel, G. Lopez, A. M. Medrano, A. Jimenez, A. Datas, M. Garin, I. Martin
Summary: In this study, a highly reflective ohmic contact to p-type c-Ge material is demonstrated, which can improve the efficiency of thermophotovoltaic devices. The experimental results show that this contact can simultaneously meet the requirements of good back surface passivation, low electrical resistivity, and high reflectivity. Moreover, simulations suggest that implementing these back contacts has the potential to achieve conversion efficiencies comparable to high-efficiency c-Ge TPV cells.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Hongyang Wei, Qing Xu, Dongchu Chen, Min Chen, Menglei Chang, Xiufang Ye
Summary: This study prepared solar selective absorption films based on anodic aluminum oxide (AAO) photonic crystals using a unique electrodeposition method. The Co-Ag electrodeposited film exhibited superior solar selective absorption properties and thermal stability.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Ankit Kumar, Ankit Chauhan, Jordi Llobet, Helder Fonseca, Patricia C. Sousa, Carlos Calaza, Gil Shalev
Summary: This study found that decorating subwavelength arrays with SiO2 quasi-nanolenses (qNL arrays) can enhance the absorption of the solar spectrum. Optical absorption mechanisms in qNL arrays were investigated using near-field scanning optical microscopy (NSOM), revealing that the enhancement is a result of the combination of effective antireflection coating, increased optical interactions between adjacent dielectrics for elevated light trapping, and strong light concentration due to the presence of qNLs.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
S. Pingel, T. Wenzel, N. Goettlicher, M. Linse, L. Folcarelli, J. Schube, S. Hoffmann, S. Tepner, Y. C. Lau, J. Huyeng, A. Lorenz, F. Clement
Summary: This study demonstrates the potential to reduce silver consumption in highly efficient SHJ cells through fine-line screen printing using low temperature paste with various screens. The results show that using finer mesh allows for narrower grid fingers and lower resistance, leading to improved cell efficiency. Simulation results indicate that module wire configuration is crucial for reducing silver consumption.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Xibo He, Jun Qiu, Wei Wang, Yicheng Hou, Yong Shuai
Summary: This paper proposes a novel phase change material with high thermal conductivity and stability for fast photo-thermal conversion and storage. The experimental results demonstrate excellent durability and stability of the phase change material, with good performance in thermal conductivity and thermal storage efficiency.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Qingyuan Liu, Lin Wang, Zheng Liu, Guohua Liu
Summary: A new evaporating structure consisting of liquid marble with tunable nanowire array is proposed to enhance solar evaporation. The experiments show that the liquid marble with nanowire array exhibits outstanding evaporation performance, which has significant implications for seawater desalination or wastewater treatment.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Hao Liu, Qiming Liu, Jinpei Liu, Yonggang Zhao, Yingjie Yu, Yue An, Ganghui Wei, Yanzheng Li, Yujun Fu, Junshuai Li, Deyan He
Summary: Moisture in the air is identified as the main cause of performance degradation in organic-inorganic hybrid solar cells. Exposure to air leads to the growth of thin oxide layer on the interface and the formation of silver sulfide, increasing the series resistance and decreasing the fill factor, thus degrading the cell performance.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
E. Blanco, P. Martin, M. Dominguez, P. Fernandez-Palacios, I. Lombardero, C. Sanchez-Perez, I. Garcia, C. Algora, M. Gabas
Summary: This study addresses the lack of optical parameters for p-type Ge wafers by determining the complex refractive indices of commercial Ge wafers with varying doping levels. The obtained data successfully reproduces the critical points associated with interband transitions and absorption features below the bandgap. The refractive indices were validated through experimental measurements and solar cell simulations.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
