Article
Energy & Fuels
Jan Keller, Patrick Pearson, Nina Shariati Nilsson, Olof Stolt, Lars Stolt, Marika Edoff
Summary: The study focused on the impact of absorber stoichiometry in ACIGS solar cells with bandgaps greater than 1.40 eV, showing that moving away from AgGaSe2 composition can reduce ordered vacancy compounds, leading to improved device performance. An inverse correlation between V-OC and J(SC) was observed, with capacitance profiling revealing enhanced carrier collection in fully depleted samples. Additionally, the measurement of a solar cell with V-OC = 0.916 V at E-g = 1.46 eV represents the highest reported value for this bandgap to date.
Article
Energy & Fuels
Woo-Ju Kim, Dae-Hyung Cho, Sung-Hoon Hong, Woo-Jung Lee, Tae-Ha Hwang, Joo Yeon Kim, Yong -Duck Chung
Summary: With the increasing use of building-integrated photovoltaic technology, diffractive nanostructures are used to create colorful solar cells that blend in with their surroundings. Various colors are produced on Cu(In,Ga)Se2 (CIGS) thin-film solar cells using nanoscale imprinting and transfer lithography methods. The material types and pattern shapes of the nanostructures have an impact on the optical properties of the solar cells. SiO2 demonstrates higher short-circuit current density (JSC) and color quality compared to TiO2.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Chemistry, Physical
Natalia M. Martin, Tobias Torndahl, Erik Wallin, Konstantin A. Simonov, Hakan Rensmo, Charlotte Platzer-Bjorkman
Summary: The study investigates the impact of postdeposition treatments on ACIGS solar cell performance, finding that different alkali metal fluoride treatments can modify the surface composition of the ACIGS absorber layer, thereby influencing device behavior.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Melike Babucci, Debora M. Meira, Erik Wallin, Jan Keller, Olivier Donzel-Gargand, Charlotte Platzer Bjorkman, Natalia M. Martin
Summary: Alloying CIGS solar cell absorber with silver can improve the performance of thin-film solar cells by increasing the optical band gap and open-circuit voltage. By using angle-resolved XAS and other measurement techniques, it is found that the local atomic arrangement of ACIGS absorbers with varying Ag content and Ga depth gradient deviates from the long-range crystallographic structure, which may affect the electronic properties of solar cells.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Energy & Fuels
Yunae Cho, Jiseon Hwang, Inyoung Jeong, Jihye Gwak, Jae Ho Yun, Kihwan Kim, William Jo
Summary: This study investigated the transport mechanism of photogenerated carriers in CIGS solar cells by analyzing temperature-dependent current density-voltage curves, revealing that the distortion of J-V curves is closely related to the illumination wavelength and persistent characteristics of the solar cell. Additionally, photo capacitance results showed distinct spatial distributions and behaviors under different illumination conditions.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Chemistry, Physical
Qing Gao, Chun Cao, Jianping Ao, Jinlian Bi, Liyong Yao, Jiajia Guo, Guozhong Sun, Wei Liu, Yi Zhang, Fangfang Liu, Wei Li
Summary: The efficiency of CIGSe solar cells was successfully increased by spin-coating an In2S3 thin film on the CIGSe surface in this study. By adjusting the thickness of In2S3 film, the surface bandgap was effectively increased, leading to improved device performance.
APPLIED SURFACE SCIENCE
(2022)
Article
Energy & Fuels
Bing Li, Aimei Zhao, Dongmei Xiang, Zhuo Peng, Yujie Yuan, Yupeng Xing, Liyong Yao, Jinlian Bi, Wei Li
Summary: In this study, an Ag buffer layer was used to eliminate the nonuniform distribution of Cu on Mo, resulting in improved crystallinity and performance of ACIGSe absorber and solar cells.
Article
Chemistry, Multidisciplinary
Mohit Raghuwanshi, Manjusha Chugh, Giovanna Sozzi, Ana Kanevce, Thomas D. Kuehne, Hossein Mirhosseini, Roland Wuerz, Oana Cojocaru-Miredin
Summary: This study investigates both Cu-poor and Cu-rich CIGS solar cells and shows the superior properties of the internal interfaces of Cu-poor cells, such as p-n junction and grain boundaries, which make them the highest-efficiency devices. By employing a correlative microscopy approach, key factors governing the device performance are discovered.
ADVANCED MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Ha Kyung Park, Yunae Cho, Kihwan Kim, Inyoung Jeong, Jihye Gwak, Jae Ho Yun, William Jo
Summary: Efficient carrier transport is crucial for enhancing the performance of thin-film solar cells. This study investigated the properties of such cells using micro-Raman scattering spectroscopy, Kelvin probe force microscopy, and photoluminescence measurements. The results indicated the importance of reducing open-circuit voltage loss for achieving higher power conversion efficiency.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Ha Kyung Park, Yunae Cho, Kihwan Kim, Inyoung Jeong, Jihye Gwak, Jae Ho Yun, William Jo
Summary: Research on efficient carrier transport for enhancing the performance of thin-film solar cells was conducted. The atomic distributions, microstructures, and defect densities of the devices were investigated to understand the charge transport at the CIGS-CdS interface. The results indicated that reducing open-circuit voltage loss is crucial for improving the power conversion efficiency.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Energy & Fuels
Parisa Zarerasouli, Hamid Bahador, Hamid Heidarzadeh
Summary: This paper discusses the use of a cluster back reflector in an ultra-thin film CIGS solar cell to improve optical parameters. The cluster nanostructure consists of four silver nanoparticles embedded in the back surface of the active layer. Among the studied cases, the cylindrical nanostructure is selected as the most efficient back reflector by optimizing the effective parameters of the plasmonic phenomenon. The analysis mainly focuses on the short-circuit current density, while power conversion efficiency, absorption spectrum, and light transmission are also studied. As a result, the localized surface plasmon resonance enhancement leads to short-circuit current density of 27.2 mA/cm2 and power conversion efficiency of 15.7%, compared to 19 mA/cm2 and 10.7% for the bare state.
Article
Energy & Fuels
D. Valencia, J. Conde, A. Ashok, C. A. Meza-Avendano, H. Vilchis, S. Velumani
Summary: This study optimized the design of CIGSe thin-film solar cells using a hybrid fabrication technique, achieving a record conversion efficiency of 21.92% through simulations. The research also focused on material utilization to avoid wastages and investigating carrier and device mechanisms to aid in fabricating low-cost and high-efficient CIGSe TFSC. The incorporation of hybrid deposition methods shows promise in enhancing power conversion efficiencies for CIGSe-based TFSC.
Article
Energy & Fuels
Pedro Santos, Daniel Brito, Pedro Anacleto, Jose Fonseca, Diana de Brito Sousa, Carlos J. Tavares, Jose Virtuoso, Marina Alves, Ana Perez-Rodriguez, Sascha Sadewasser
Summary: This study investigates the impact of copper stoichiometry on the grain size of sputtered CIGSe absorbers and the efficiency of solar cells. It was found that using a Cu-rich target for sputtering CIGSe films results in larger grain size and better solar cell performance. Additionally, a two-stage process was introduced to further enhance solar cell performance by eliminating unwanted impurities and avoiding toxic etching processes.
IEEE JOURNAL OF PHOTOVOLTAICS
(2021)
Article
Nanoscience & Nanotechnology
Elizaveta Pyatenko, Dirk Hauschild, Vladyslav Mikhnych, Raju Edla, Ralph Steininger, Dimitrios Hariskos, Wolfram Witte, Michael Powalla, Clemens Heske, Lothar Weinhardt
Summary: In this study, the chemical structure of the Cu(In,Ga)Se-2 (CIGSe) thin-film solar cell absorber surfaces and their interface with a Ga2O3 buffer layer were investigated. The effects of different treatments on the chemical composition and impurities at the absorber surface were analyzed using various spectroscopic techniques. The results suggest that a specific rinsing step can effectively remove impurities and alter the chemical composition of the absorber layer.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Physics, Applied
Ishwor Khatri, Mutsumi Sugiyama
Summary: This study explores the combined effect of cesium fluoride as a precursor and post-treatment on CIGS thin film solar cells, revealing improved device performance in terms of open-circuit voltage, fill factor, and cell efficiency. While the combined treatment reduces interfacial recombination by increasing Cs diffusion, it does not prevent the formation of bulk defects that lead to deterioration in device performance.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Applied
Neul Ha, Takaaki Mano, Yu-Nien Wu, Ya-Wen Ou, Shun-Jen Cheng, Yoshiki Sakuma, Kazuaki Sakoda, Takashi Kuroda
APPLIED PHYSICS EXPRESS
(2016)
Article
Physics, Condensed Matter
R. Kaji, T. Tominaga, Y. -N. Wu, M. -F. Wu, S. -J. Cheng, S. Adachi
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2017)
Article
Chemistry, Multidisciplinary
Yu-Kuang Liao, Yung-Tsung Liu, Dan-Hua Hsieh, Tien-Lin Shen, Ming-Yang Hsieh, An-Jye Tzou, Shih-Chen Chen, Yu-Lin Tsai, Wei-Sheng Lin, Sheng-Wen Chan, Yen-Ping Shen, Shun-Jen Cheng, Chyong-Hua Chen, Kaung-Hsiung Wu, Hao-Ming Chen, Shou-Yi Kuo, Martin D. B. Charlton, Tung-Po Hsieh, Hao-Chung Kuo
Article
Chemistry, Multidisciplinary
Guan-Hao Peng, Ping-Yuan Lo, Wei-Hua Li, Yan-Chen Huang, Yan-Hong Chen, Chi-Hsuan Lee, Chih-Kai Yang, Shun-Jen Cheng
Article
Multidisciplinary Sciences
Hanz Y. Ramirez, Ying-Lin Chou, Shun-Jen Cheng
SCIENTIFIC REPORTS
(2019)
Article
Multidisciplinary Sciences
Yan-Hong Chen, Chi-Hsuan Lee, Shun-Jen Cheng, Chih-Kai Yang
SCIENTIFIC REPORTS
(2020)
Article
Chemistry, Multidisciplinary
Kristan Bryan Simbulan, Teng-De Huang, Guan-Hao Peng, Feng Li, Oscar Javier Gomez Sanchez, Jhen-Dong Lin, Chun- Lu, Chan-Shan Yang, Junjie Qi, Shun-Jen Cheng, Ting-Hua Lu, Yann-Wen Lan
Summary: This study investigates the photoluminescence of monolayer molybdenum disulfide under photoexcitation of twisted light, revealing an increase in spectral peak energy with the intensity of incident light. The nonlinear-dependence of the spectral blue shifts is explained through analysis and computational simulation, while the unusual lightlike exciton band dispersion of valley excitons in monolayer transition metal dichalcogenides is evidenced through experimental setup.
Article
Physics, Multidisciplinary
Trinh Le Huyen, Chi-Hsuan Lee, Shun-Jen Cheng, Chih-Kai Yang
Summary: First-principles density functional theory (DFT) is used to study the interaction between peptide molecules and a two-dimensional (2-D) monolayer of molybdenum disulfide (MoS2) with a nanopore. The results show bonding between some molecules and the hole edge of MoS2, and the potential energy surface can be used to predict the reaction outcome. These findings suggest that 2-D MoS2 nanopores have a wide range of biological applications and should be further investigated experimentally.
CHINESE JOURNAL OF PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Wei-Hua Li, Jhen-Dong Lin, Ping-Yuan Lo, Guan-Hao Peng, Ching-Yu Hei, Shao-Yu Chen, Shun-Jen Cheng
Summary: In this work, the exciton fine structures of WSe2 monolayers in various dielectric-layered environments are investigated using theory and computation. It is found that the influence of the dielectric environment on the exciton fine structures is limited due to the non-locality of Coulomb screening. The non-locality of screening in 2D materials is demonstrated by the non-linear correlation between the fine structure splittings and exciton-binding energies. The environment-insensitive exciton fine structures suggest the robustness of dark-exciton-based optoelectronics.
Article
Nanoscience & Nanotechnology
Jhen-Dong Lin, Ping-Yuan Lo, Guan-Hao Peng, Wei-Hua Li, Shiang-Yu Huang, Guang-Yin Chen, Shun-Jen Cheng
Summary: We theoretically investigate exciton-mediated Forster resonant energy transfers (FRET's) from photoexcited quantum dots (QD's) to transition-metal dichalcogenide monolayers (TMD-ML's) based on first-principles-calculated exciton fine structures. The enhanced Coulomb interactions in atomically thin TMD-MLs make them an exceptional platform for exciton-mediated FRET, utilizing the superior excitonic properties. The FRET responses of TMD-ML's are governed by momentum-forbidden dark excitons, specifically the longitudinal dark exciton states with exchange-driven light-like linear band dispersion, which enhance the efficiency and robustness of FRET against the inhomogeneity of QD-donor ensembles.
NPJ 2D MATERIALS AND APPLICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Guan-Hao Peng, Oscar Javier Gomez Sanchez, Wei-Hua Li, Ping-Yuan Lo, Shun-Jen Cheng
Summary: This study presents a systematic theoretical investigation of photoexcited valley excitons in TMD-ML's by polarized Laguerre-Gaussian beams, revealing the formation of superposition of finite-momentum exciton states.
Article
Physics, Multidisciplinary
Ping-Yuan Lo, Guan-Hao Peng, Wei-Hua Li, Yi Yang, Shun-Jen Cheng
Summary: This study investigates the full-zone landscape of finite-momentum dark excitons in WSe2 monolayers using density-functional theory and Bethe-Salpeter equation. The results show comprehensive valley-polarization landscape and rich valley pseudospin texture in extended exciton-momentum space. Additionally, the superior valley polarizations of the intervalley dark excitons in WSe2 monolayers are almost fully transferable to optical polarization in phonon-assisted photoluminescences.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Shun-Jen Cheng, Yi Yang, Yu-Nien Wu, Yu-Huai Liao, Guan-Hao Peng
Proceedings Paper
Engineering, Electrical & Electronic
Shiang-Yu Huang, Guang-Yin Chen, Yueg-Nan Chen, Shun-Jen Cheng
2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC)
(2017)
Article
Materials Science, Multidisciplinary
Yu-Nien Wu, Ming-Fan Wu, Ya-Wen Ou, Ying-Lin Chou, Shun-Jen Cheng
