Article
Energy & Fuels
Jiajia Guo, Yang Mao, Jianping Ao, Yanchen Han, Chun Cao, Fangfang Liu, Yi Zhang
Summary: In this study, a controllable CdS nanolayer prepared by chemical bath deposition was introduced between CZTS precursors and Mo back contact, successfully modifying the surface chemistry of the Mo film and improving the quality of the CZTSSe absorber layer. The efficiency of CZTSSe solar cells increased by 26% with the introduction of the CdS nanolayer. This work provides a cost-effective approach to design and modify the interface of photovoltaic and photoelectrochemical devices.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Energy & Fuels
Sudheendra Prabhu, Sushil Kumar Pandey, Subhananda Chakrabarti
Summary: This paper investigates the improvements of Kesterite Cu2ZnSnS4 (CZTS) thin-film technology, proposing the use of a cadmium-free buffer layer, multiple quantum wells structure, and a back surface field layer to overcome performance limitations. The study provides detailed analysis and optimization of the modified structure, offering imperative guidelines for the fabrication of high-efficiency CZTS solar cells using non-toxic and earth-abundant materials.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Physics, Applied
Baseerat Bibi, Bita Farhadi, H. M. Noor Ul Huda Khan Asghar, Waseem Ur Rahman, Aimin Liu
Summary: This study presents a tandem solar cell made of kesterite materials that can capture sunlight over a broad spectrum. The performance of the upper and lower subcells is optimized, resulting in improved efficiency and open-circuit voltage of the solar cell.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Chris A. Benisha, Soumyaranjan Routray
Summary: This paper analyzes the impact of a BSF layer on solar cell performance and presents a numerical investigation on the influence of different loss mechanisms on device performance. It is found that the incorporation of a BSF layer leads to remarkable efficiency improvement in solar cells.
Article
Chemistry, Physical
Quanzhen Sun, Jianlong Tang, Caixia Zhang, Yaling Li, Weihao Xie, Hui Deng, Qiao Zheng, Jionghua Wu, Shuying Cheng
Summary: Flexible CZTSSe solar cells, which have abundant earth elements, high stability, and wide application prospects, have gained significant attention. However, the high toxicity of the Cd in the buffer layers poses environmental problems. In this study, a Cd-free flexible CZTSSe/ZnO solar cell was developed, and the influence of ZnO films on device performances was investigated. The removal of the CdS layer enhanced the light absorption capacity of flexible CZTSSe solar cells. The optimized thickness of the ZnO buffer layers and the appropriate annealing temperature of the CZTSSe/ZnO were found to be 100 nm and 200 C-?. Ultimately, the optimized device achieved an efficiency of 5.0%, which is the highest for flexible CZTSSe/ZnO solar cells. Systematic characterizations showed that the optimized flexible CZTSSe/ZnO solar cells exhibited quality heterojunction, low defect density, and better charge transfer capability. This work provides a new strategy for the development of environmentally friendly and low-cost flexible CZTSSe solar cells.
Article
Energy & Fuels
Sudheendra Prabhu, Sushil Kumar Pandey, Subhananda Chakrabarti
Summary: In this study, a numerical simulation approach was used to optimize the CZTSSe solar cell structure by replacing the traditional buffer layer and attempting to improve performance by using SnSe. A high power conversion efficiency was achieved through evaluating band alignment and replacing materials, resulting in a lower cost and higher efficiency solar cell structure.
Article
Energy & Fuels
H. P. Yin, W. S. Tang, J. B. Zhang, W. Shan, X. M. Huang, X. D. Shen
Summary: The primary challenge to the industrial application of n-type silicon solar cells is their relatively complicated process flow compared to p-type cells. However, by introducing a simple processing sequence and selective BSF structure, the conversion efficiency of the cells can be significantly improved. This paper demonstrates an approach to fabricate n-type silicon solar cells with a conversion efficiency of 21.7% in batches with tight efficiency distribution.
Article
Chemistry, Physical
Hongmei Luan, Bin Yao, Yongfeng Li, Ruijian Liu, Zhanhui Ding, Zhenzhong Zhang, Haifeng Zhao, Ligong Zhang
Summary: In this study, Cd-doped Cu2ZnSn(S,Se)(4) films were prepared and used as absorbers in solar cells. The Cd diffusion doping improved crystal quality, leading to increased J(sc), V-oc, FF, and PCE of the solar cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Siyu Wang, Zhenwu Jiang, Zhan Shen, Yali Sun, Hongling Guo, Li Wu, Jianjun Zhang, Jianping Ao, Hai Wang, Yi Zhang
Summary: The study introduced an additional In(2)S(3) buffer layer and improved the properties of the Zn(O,S) and CZTSSe layers through post-annealing and etching treatments, resulting in an efficiency improvement of 24% in CZTSSe solar cells.
SCIENCE CHINA-MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Shivani Gohri, Jaya Madan, Rahul Pandey, Rajnish Sharma
Summary: CZTSSe-based solar cell structures have advantages of low cost, high stability, and high absorption coefficient, but their power conversion efficiency needs improvement. This study successfully increased efficiency from 12.57% to 16.34% and 17.04% by examining the feasibility of using SnS and Sn2S3 as BSF layer materials.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Energy & Fuels
S. Moser, A. N. Tiwari, R. Carron
Summary: Alkali doping and alloying have been proven effective strategies to enhance the performance of CZTSSe thin film solar cells. This study explores the combined effects of Li and Na in a co-doping approach and finds that the concentrations of both alkali elements in the CZTSSe absorber layer depend on each other. Additionally, Li and Na show signs of forming alloys with the CZTSSe phase.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Chemistry, Physical
Suyoung Jang, Vijay C. Karade, Jun Sung Jang, Eunae Jo, Hongjae Shim, Su Gil Kim, Komal Patil, Kuldeep Singh Gour, Jin Hyeok Kim
Summary: This study investigates the optical, electrical, and structural properties of ZnO thin films co-doped with metal atoms and fluorine. The results show that F-doped thin films exhibit improved optoelectronic and structural properties compared to undoped thin films. The co-doped thin films demonstrate a surface passivation effect, leading to decreased resistivity and increased transmittance. When applied to CZTSSe thin-film solar cells, the co-doped thin films contribute to increased power conversion efficiency.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Electrical & Electronic
Irfan Qasim, Owais Ahmad, Asim Rashid, Tashfeen Zehra, Muhammad Imran Malik, Muhammad Rashid, M. Waqar Ahmed, M. Farooq Nasir
Summary: This study investigates the optimization of perovskite solar cells based on methyl ammonium tin halide (CH3NH3SnI3) using solar capacitance simulations software, determining the ideal thickness values for different layers to achieve maximum power conversion efficiency. The findings provide valuable information for designing and fabricating environmentally friendly, non-toxic, and highly efficient solar cells.
OPTICAL AND QUANTUM ELECTRONICS
(2021)
Article
Chemistry, Physical
Kuldeep Singh Gour, Vijay C. Karade, Minwoo Lee, Jun Sung Jang, Eunae Jo, Pravin Babar, Hongjae Shim, Jae Sung Yun, Jongsung Park, Jin Hyeok Kim
Summary: This study demonstrates a potential approach to improve the performances of CZTSSe thin-film solar cells through a combination of back-interface passivation and doping, resulting in enhanced short-circuit current density, fill factor, and power conversion efficiency.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Biwen Duan, Licheng Lou, Fanqi Meng, Jiazheng Zhou, Jinlin Wang, Jiangjian Shi, Huijue Wu, Yanhong Luo, Dongmei Li, Qingbo Meng
Summary: The two-step annealing method effectively enhances the quality of the CZTSSe/CdS heterojunction, optimizes band alignment to facilitate carrier transportation, reduces charge recombination losses, and decreases defect densities within the device.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Thermodynamics
Priyanka Jaiswal, Vandita Rao, Pravin Kumar Singh, Pooja Lohia, D. K. Dwivedi
Summary: Carbon nanotube-added Cu5Se75Te10In10 glassy composites have been successfully developed through the melt quench mechanism. SEM and DSC were used to study the composition and glass transition kinetics, revealing that the glass transition temperature increases with CNT concentration. Activation energy of glass transition mechanism was determined using Kissinger's and Moynihan's relations, and thermal characteristics were studied using various quantitative methods.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Materials Science, Multidisciplinary
Sachin Singh, A. K. Sharma, Pooja Lohia, D. K. Dwivedi, Sadanand, Hassan Fouad, M. S. Akhtar
Summary: This study introduces three new Kretschmann-configuration-based heterostructure surface plasmon resonance sensors for biomolecule detection, with optimized layer thicknesses to enhance sensitivity. The silicon layer plays a crucial role in improving all performance parameters, and increasing the number of heterostructure layers significantly boosts sensor sensitivity.
EMERGING MATERIALS RESEARCH
(2022)
Article
Optics
Shivangani, Pooja Lohia, Pravin Kumar Singh, Sachin Singh, D. K. Dwivedi
Summary: In this study, a new structure of surface plasmon resonance sensor is proposed, which incorporates a sandwiched layer of Al2O3 between silver and nickel films, as well as a two-dimensional heterostructure material. Numerical simulation is performed to calculate the sensitivity of the sensor to refractive index changes, as well as other performance parameters. The results show that the proposed sensor structure achieves enhanced sensitivity in the visible region.
JOURNAL OF OPTICS-INDIA
(2023)
Article
Physics, Multidisciplinary
Sachin Singh, Anuj K. K. Sharma, Pooja Lohia, D. K. Dwivedi, Vipin Kumar, Pravin Kumar Singh
Summary: In this study, a highly angular sensitive surface plasmon resonance (SPR) biosensor has been developed for the detection of cancer cells. The biosensor structure is based on the Kretschmann configuration and utilizes an angular interrogation technique. It has the potential to detect various types of cancer cells with refractive index alterations ranging from 1.360 to 1.390. The biosensor design, which consists of multiple layers including CaF2 prism, silver metal, bismuth telluride (Bi2Te3), and MXene (Ti3C2Tx) layers, has been optimized for performance parameters such as angular sensitivity, quality factor, detection accuracy, and electric field intensity distribution.
Article
Materials Science, Multidisciplinary
M. T. Islam, A. K. Thakur
Summary: The study reports a 3.5 times enhancement in efficiency for Sb2S3 absorber based solar cells, achieved through tailored architecture and interfacial engineering. The enhancement is attributed to reduced interfacial recombination due to design modifications, such as optimal intrinsic layer insertion, carrier density control, absorber bandgap widening, Fermi level pinning, and back surface field at Sb2S3/metal junction. The improvements in short circuit current, open circuit voltage, fill factor, and efficiency were achieved by lowering hole carrier density, engineering band gap near the Sb2S3/CdS junction, and reducing interfacial recombination. Simulation analysis confirmed the effectiveness of CdS buffer layer in reducing recombination, while a high hole concentration thin layer at the Sb2S3/metal interface also contributed to lower back contact recombination. The modified solar cell architecture demonstrated the potential of chalcogenide solar cells with an enhanced efficiency of 16% compared to the reported 4.5% in literature.
CURRENT APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Rajnish Raj, Pooja Lohia, D. K. Dwivedi, Pravin Kumar Singh, Arpit Verma, B. C. Yadav
Summary: This research presents a synthesis approach for a highly responsive and cost-effective Ge-Sb-S nanomaterial for photodetection system. The characterization of the samples was performed using various techniques including XRD and SEM. The photodetector device made of (GeS2)(40)(Sb2S3)(60) showed the highest responsivity, EQE, and detectivity at a bias potential of 5 V.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Naureen, Sadanand, Shambhavi Rai, R. K. Yadav, Pooja Lohia, D. K. Dwivedi
Summary: Quantum dot solar cells (QDSCs) have recently gained attention due to their eco-friendly, light-harvesting, and cost-effective materials. This study investigates the optimization of two different device architectures using WO3 and WS2 as electron transport layers (ETLs) through numerical analysis using Solar Cell Capacitance Simulator-1 dimensional software (SCAPS-1D). Sb2Se3 is used as an absorber layer, PbS as HTL, and CdS as a buffer layer in the proposed device structure. The objective is to determine the impact of changing from WO3 ETL to WS2 ETL on the photovoltaic parameters. Optimization of the solar photovoltaic device and the effect of doping concentrations, series and shunt resistance, and temperature on device performance are also studied. The optimized performance with WS2 ETL achieves a power conversion efficiency (PCE) of 20.60%.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Jyoti Singh, Sachin Singh, Vaibhava Srivastava, Rajesh Kumar Sadanand, Rajesh Kumar Yadav, Pooja Lohia, Dilip Kumar Dwivedi
Summary: Novel solar power technologies, such as quantum dot solar cells (QDSCs), show promise in meeting the global demand for electricity and energy. This study uses WO3, MoTe2, and PbS-TBAI to optimize the performance of QDSCs. By optimizing temperature, series-shunt resistance, and absorber layer thickness, the efficiency of QDSCs can be improved.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2023)
Article
Optics
Sachin Singh, Sushant Pandey, Sapana Yadav, Rajesh Kumar Yadav, Pravin Kumar Singh, Pooja Lohia, D. K. Dwivedi
Summary: In this study, a comparative investigation of surface plasmon resonance (SPR)-based sensors designed with gold (Au), aluminium (Al), and silver (Ag) is conducted to enhance the device performance. Ni-antimonene layer is used in the sensor configuration to improve the sensitivity. The performance parameters of the SPR sensor, such as sensitivity, detection accuracy, and quality factor, are evaluated and compared for Ag, Au, and Al metals.
JOURNAL OF OPTICS-INDIA
(2023)
Review
Materials Science, Multidisciplinary
Sharanya Kandula, Pravin Kumar Singh, Gun Anit Kaur, Ashutosh Tiwari
Summary: Cancer is a global health issue and innovative treatments are in high demand. Smart drug delivery systems have gained popularity for improving the effectiveness and safety of cancer treatments. This article provides an update on the state of smart drug delivery systems for cancer, discussing the significance of drug delivery, targeted delivery methods, current issues, and future directions.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Physics, Multidisciplinary
M. T. Islam, A. K. Thakur
Summary: A novel multi-step design simulation was conducted on a SnS absorber based solar cell architecture, resulting in a 4.5 times enhancement in efficiency compared to reported experimental results. The improvement can be attributed to the efficient control over inherent loss mechanism achieved through device design modifications. The design approach included widening the absorber bandgap at the interface, considering donor interfacial defects, limiting the presence of majority carriers at the interface via asymmetric doping, and employing a back surface field at the absorber/back metal contact interface.
Article
Materials Science, Multidisciplinary
Md Tasirul Islam, Awalendra Kumar Thakur
Summary: By optimizing and simulating the design, the efficiency of SnS absorber-based solar cells has been improved. The substitution of Se for sulfur in SnS and the replacement of CdS buffer layer with non-toxic Zn (O, S) significantly enhance the device performance. With the optimal parameters, the efficiency can reach 19.2%.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Shivam Singh, Sachin Singh, Pravin Kumar Singh, Rajesh Kumar Yadav, Pooja Lohia, D. K. Dwivedi
Summary: An ultra-sensitive bimetallic surface plasmon resonance biosensor is proposed for detecting malaria disease at different stages. The device structure is based on the Kretschmann configuration and consists of multiple layers, including BK7 prism, silver (Ag) metal layer, zinc telluride (ZnTe), and lead titanate (PbTiO3). The sensor's performance is based on the angular interrogation method. It can detect various stages of malaria disease and covers a wide range of refractive index (RI) with optimized angular sensitivity of 253 degrees/RIU. The proposed sensor is particularly effective for detecting the ring stage and various cancerous cells.
Article
Nanoscience & Nanotechnology
Ahmad Umar, Pravin Kumar Singh, Sadanand, D. K. Dwivedi, Ahmed A. Ibrahim, Mohsen A. M. Alhamami, Hussam Qasem, Sheikh Akbar, S. Baskoutas
Summary: To overcome the toxicity of lead, researchers have investigated lead-free perovskite solar cells and conducted studies to improve their power conversion efficiency and sustainability. This study explores the effects of NiO nanocomposite as a hole transport layer on the performance of the solar cells, and investigates the impact of factors such as absorber layer thickness, transport layer thickness, bandgap, and operating temperature.
SCIENCE OF ADVANCED MATERIALS
(2022)
Article
Physics, Multidisciplinary
V Rao, P. K. Singh, P. Lohia, D. K. Dwivedi
Summary: The paper discusses the kinetic variables of crystallization kinetics in Se-Te-Ge glassy alloys. Various methods were used to analyze the structure, phase transition, and kinetic parameters of the alloys.
INDIAN JOURNAL OF PHYSICS
(2022)
