Article
Chemistry, Multidisciplinary
Xinxing Liu, Junjun Zhang, Liting Tang, Junbo Gong, Wang Li, Zengyang Ma, Zexin Tu, Yanyan Li, Ruiming Li, Xuzhi Hu, Chen Shen, He Wang, Zhiping Wang, Qianqian Lin, Guojia Fang, Sheng Wang, Chang Liu, Zengming Zhang, Jianmin Li, Xudong Xiao
Summary: By incorporating Cl and conducting surface treatment for the CsFAPb(IBr)(3) system, this study successfully reduced defect densities and significantly improved open-circuit voltage and power conversion efficiency in PSCs. Integration of a highly efficient 1.67 eV PSC top cell with various bandgap CIGS solar cells resulted in a calculated tandem efficiency of 28.4%, currently the highest for PSC/CIGS tandem cells. The findings pave the way for highly efficient monolithic two-terminal PSC/CIGS tandem devices in the future.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Multidisciplinary Sciences
Joo-Hyun Kim, Hyemi Han, Min Kyu Kim, Jongtae Ahn, Do Kyung Hwang, Tae Joo Shin, Byoung Koun Min, Jung Ah Lim
Summary: In this study, a solution-processed near-infrared photodetector based on CIGS was successfully developed, with the incorporation of potassium promoting Se uptake in the film to improve light absorption and charge carrier separation. The addition of potassium also enhanced chalcopyrite crystalline grain growth, increasing charge carrier mobility and ultimately improving photosensitivity and external quantum efficiency of the photodetector.
SCIENTIFIC REPORTS
(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
Chemistry, Multidisciplinary
Keyi Lin, Chenxi Pang, Gang Li, Jujun Ruan
Summary: This study developed a green, efficient, and economical technology using microsolid media frictional separation to enrich scattered metals from flexible Cu(InGa)Se-2 solar cells, effectively reducing the difficulty of waste solar cell treatment.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Bo Chen, Zhenhua Yu, Arthur Onno, Zhengshan Yu, Shangshang Chen, Jiantao Wang, Zachary C. Holman, Jinsong Huang
Summary: This paper reports on a bifacial all-perovskite tandem structure that achieves an equivalent efficiency of 29.3% under a back-to-front irradiance ratio of 30. By embedding a light-scattering micrometer-sized particle layer and using a nonacidic hole transport layer, the efficiency of semitransparent Pb-Sn cells is increased from 15.6% to 19.4%, enabling the fabrication of efficient bifacial all-perovskite tandem devices.
Article
Energy & Fuels
Yi-Cheng Lin, Chao-Hsuan Chang, Yu-Jen Hung
Summary: This study focuses on the fabrication of bandgap grading Sb2(S,Se)3 solar cells through sputtering and postselenization/sulfurization methods. The effects of S/(S + Se) ratio on material characteristics and photovoltaic performances are investigated. Optimal S/(S + Se) ratio of 0.27 is found to result in a power conversion efficiency (PCE) of 7.1%, setting a new efficiency record for antimony chalcogenide-based thin film solar cells prepared via sputtering and post-selenization.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Materials Science, Multidisciplinary
Jae Hyun Park, Su Geun Ji, Young Seon Yoon, Min-Ah Park, Sun Hwa Lee, Ki Hong Kim, Jin Young Kim
Summary: As an alternative to crystalline Si (c-Si) cells, perovskite (PVSK)/Si tandem solar cells (TSCs) are gaining attention for their higher efficiency. The tandem device combines the maturity of c-Si cells and the high performance of PVSK solar cells, leading to increasing expectations for commercialization. This perspective article summarizes the recent progress of PVSK/Si TSCs and reviews opto-electronic characterization methods, providing insights for further development.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Energy & Fuels
M. Okil, Ahmed Shaker, Ibrahim S. Ahmed, Tarek M. Abdolkader, Marwa S. Salem
Summary: This study proposes a two-terminal monolithic Sb2S3/Si thin film tandem solar cell structure and investigates it through TCAD simulation. By optimizing the structure of the top sub-cell and the bandgap of the bottom thin-film silicon cell, a conversion efficiency of 10.10% is achieved. Further optimization of various parameters improves the efficiency of the tandem cell to 19.51%.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Review
Chemistry, Physical
Wentao Zhou, Yihua Chen, Huanping Zhou
Summary: Organic-inorganic metal halide perovskite-based tandem solar cells have shown great potential for practical applications due to their high power conversion efficiency. However, their instability remains a major challenge for commercialization. Strategies to improve the stability of both wide-bandgap and narrow-bandgap perovskites are crucial for advancing the development of perovskite-based tandem solar cells.
ACTA PHYSICO-CHIMICA SINICA
(2021)
Article
Chemistry, Inorganic & Nuclear
Yuwei Zhang, Lina Wang, Xiaoxiang Xu
Summary: CuBi2O4 and CuWO4 films were fabricated on an FTO substrate to construct an all-copper-based oxide tandem cell for solar-driven photoelectrochemical water splitting. The tandem cell exhibited a water splitting photocurrent of 0.3 mA without an external bias under simulated solar insolation, showcasing its potential for solar energy conversion applications.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Review
Chemistry, Multidisciplinary
Steponas Asmontas, Muhammad Mujahid
Summary: Tandem solar cells are seen as the future of the photovoltaic industry due to their high power conversion efficiency. The development of halide perovskite absorber material has enabled the creation of more efficient tandem solar cells. However, challenges such as instability and difficulties in large-scale production remain.
Review
Materials Science, Multidisciplinary
Qian-Qian Chu, Zhijian Sun, Jinho Hah, Kyoung-sik Moon, Bo Cheng, Dong Wang, Peng Xiao, Yang Zhou, Annamaria Petrozza, Guan-Jun Yang, Hongxia Wang, Ching-Ping Wong
Summary: This review presents the latest progress and limitations of metal halide perovskites in tandem photovoltaic devices, discussing their unique instabilities and energy loss channels. It also provides insights on the challenges and opportunities for future research in this field.
Article
Chemistry, Physical
Kai Lv, Chengwu Shi, Rui Cao, Wangchao Chen, Guiju Hu, Fuling Guo, Yanqing Wang
Summary: Sb2S3-ySey thin films were prepared using a hydrothermal growth solution and solar cells with FTO/CdS/Sb2S3-ySey/spiro-OMeTAD/Au architecture were fabricated. The position of CdS/FTO substrate and the volume of growth solution strongly influenced the properties of Sb2S3-ySey thin films and the photovoltaic performance of solar cells. The introduction of P3HT and TMT-TTF into spiro-OMeTAD increased the power conversion efficiency of Sb2S3-ySey solar cells.
MATERIALS TODAY ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Tianjiao Han, Weidong Zhu, Tianran Wang, Mei Yang, Yuanbo Zhou, He Xi, Peng Zhong, Dazheng Chen, Jincheng Zhang, Chunfu Zhang, Yue Hao
Summary: This study developed two-terminal, mechanically-stacked perovskite/silicon tandem solar cells with an MXene interlayer, achieving high power conversion efficiencies through optimized interfacial carrier transportation and light transmission.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Energy & Fuels
Indu Sharma, Pravin S. Pawar, Rahul Kumar Yadav, Raju Nandi, Jaeyeong Heo
Summary: This review article focuses on the effect of graded absorber layers on the performance of thin-film solar cells (TFSCs), as well as the tuning of absorber layer bandgaps for achieving high performance. It provides insights into current progress and future possibilities in the field of graded TFSCs.
Article
Chemistry, Applied
Chiho Kim, Seong Hyun Kim, Seunghun Lee, Ilyeong Kwon, Seong Hyun Kim, Shinho Kim, Changgyu Seok, Yoo Sei Park, Yangdo Kim
Summary: The study developed sulfur-incorporated nickel iron (oxy)hydroxide nanosheets as a bifunctional electrocatalyst, which exhibited enhanced catalytic activity for the hydrogen evolution reaction and oxygen evolution reaction in alkaline electrolyte. This material showed promising potential for large-scale industrial hydrogen production with its low cost, high activity, and durability, as well as the opportunity for developing effective and feasible solar power systems in the future.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Physics, Applied
Hamidou Tangara, Yulu He, Muhammad Monirul Islam, Shogo Ishizuka, Takeaki Sakurai
Summary: It has been found that heat light soaking (HLS) can increase the net doping density of CIGS solar cells, but has a lower than expected improvement on the open-circuit voltage (V (OC)). Analysis based on the SQ theory reveals that HLS reduces the nonradiative recombination rate in the bulk but increases it at the interface. A combination of HLS and KF/NaF-PDT is necessary to enhance the positive impacts of HLS and mitigate the detrimental ones leading to high-efficiency CIGS devices (22%).
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
Shogo Ishizuka, Jiro Nishinaga, Kosuke Beppu, Tsuyoshi Maeda, Fuuka Aoyagi, Takahiro Wada, Akira Yamada, Jakapan Chantana, Takahito Nishimura, Takashi Minemoto, Muhammad Monirul Islam, Takeaki Sakurai, Norio Terada
Summary: This paper reviews current issues in physical and chemical studies of CISe-based materials and devices, focusing on areas such as correlations between Cu-deficient phases and alkali-metals effects, applications to lightweight and flexible solar minimodules, single-crystalline epitaxial Cu(In,Ga)Se-2 films and devices, differences between Cu(In,Ga)Se-2 and Ag(In,Ga)Se-2 materials, wide-gap CuGaSe2 films and devices, all-dry processed CISe-based solar cells with high photovoltaic efficiencies, and fundamental studies on open circuit voltage loss analysis and energy band structure at the interface.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Jiro Nishinaga, Shogo Ishizuka
Summary: This study investigates the effects of KF-PDT and NaF doping on the conversion efficiency of Cu(In,Ga)Se-2(CIGS) solar cells. It is found that these treatments have positive effects on efficiency even when using Cu stoichiometric CIGS layers. The study also shows that NaF doping and KF-PDT increase the minority carrier lifetimes, similar to polycrystalline CIGS solar cells.
Article
Nanoscience & Nanotechnology
Takehiko Nagai, Jiro Nishinaga, Hitoshi Tampo, Shinho Kim, Kazuhiro Hirayama, Tatsuo Matsunobe, Guanzhong Chen, Yuya Ide, Shogo Ishizuka, Hajime Shibata, Shigeru Niki, Norio Terada
Summary: In this study, we investigated the band alignments at CdS/epitaxial CuInxGa1-xSe2 (epi-CIGSe) and epi-CIGSe/GaAs heterointerfaces for solar cell applications using photoemission spectroscopy techniques. The impact of KF postdeposition treatment (KF-PDT) on the band alignment at the CdS/epi-CIGSe front heterointerface was clarified. We found that KF-PDT changed the conduction band alignment by altering the electron affinity and ionization potential of the epi-CIGSe surface. Additionally, band alignment at the epi-CIGSe/GaAs rear heterointerface was investigated, showing the formation of electron barriers and a hole accumulation layer.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Energy & Fuels
Kikuo Makita, Yukiko Kamikawa, Hidenori Mizuno, Ryuji Oshima, Yasushi Shoji, Shogo Ishizuka, Ralph Mueller, David Lackner, Frank Dimroth, Takeyoshi Sugaya
Summary: A highly efficient InGaP/Al$_0.06$Ga$_0.94$As//CIGSe three-junction solar cell was successfully fabricated using a new smart stack technology, achieving a total efficiency of 28.06%, the highest efficiency ever reported for GaAs//CIGSe-based tandem solar cells.
IEEE JOURNAL OF PHOTOVOLTAICS
(2022)
Article
Energy & Fuels
Kikuo Makita, Yukiko Kamikawa, Takashi Koida, Hidenori Mizuno, Ryuji Oshima, Yasushi Shoji, Shogo Ishizuka, Tatsuya Takamoto, Takeyoshi Sugaya
Summary: This study presents a highly efficient InGaP/GaAs//CIGSe three-junction solar cell with an efficiency of 29.3% for the aperture area, the highest reported for GaAs//CIGSe-based tandem solar cells. The improved performance is achieved by using a modified smart stack technology and a specialized CIGSe cell with a flattened surface and a thin In2O3;Ce,H transparent conducting oxide layer.
PROGRESS IN PHOTOVOLTAICS
(2023)
Article
Energy & Fuels
Yukiko Kamikawa, Taizo Masuda, Jiro Nishinaga, Shogo Ishizuka
Summary: This study investigated the influence of Ar background pressure on the properties of Mo back contact on polyimide films. High Ar pressure caused crack formation in the Mo layer and decreased fill factor, while reducing the Ar pressure improved the fill factor. Additionally, the stress condition of Mo also affected the thermal diffusion of alkali metal.
Article
Chemistry, Multidisciplinary
Shogo Ishizuka, Riku Okamoto, Shigeru Ikeda
Summary: This article discusses the efficiency of solar cells and photocathodes using CGSe photoabsorber layers and highlights the importance of interface modification in controlling energy conversion device parameters.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Physical
Kaede Makiuchi, Fumio Kawamura, Junjun Jia, Yelim Song, Shunichiro Yata, Hitoshi Tampo, Hidenobu Murata, Naoomi Yamada
Summary: Single-phase MgSnN2 thin films with rocksalt structure were successfully synthesized through high-pressure heat treatment and epitaxial growth. These films show potential as optoelectronic materials for light-emitting diodes and tandem solar cells.
CHEMISTRY OF MATERIALS
(2023)
Article
Physics, Applied
Jiro Nishinaga, Manabu Togawa, Masaya Miyahara, Kosuke Itabashi, Hironori Okumura, Masataka Imura, Yukiko Kamikawa, Shogo Ishizuka
Summary: Radiation tolerance of Cu(In,Ga)Se-2 (CIGS) solar cells was investigated for application in extremely-high-radiation environments. The cells deteriorated after high-energy proton irradiation but could still generate power. Recombination centers in CIGS layers increased after irradiation, but heat-light annealing partially passivated them. Dark annealing also had a beneficial effect on passivating recombination centers, even with thicker CIGS layers.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2023)
Article
Physics, Applied
Hajime Shibata, Jiro Nishinaga, Yukiko Kamikawa, Hitoshi Tampo, Takehiko Nagai, Takashi Koida, Shogo Ishizuka, Toshimitsu Mochizuki, Masafumi Yamaguchi
Summary: The optoelectronic reciprocity theorem relates electroluminescence (EL) and photovoltaic external quantum efficiency in solar cells and is crucial for understanding solar cell operation and device evaluation. It also allows for estimating the open-circuit voltage (VOC) using the external radiative efficiency (riext) obtained from EL emission intensity. This study confirms the validity of the optoelectronic reciprocity theorem for high-efficiency CuIn1-xGaxSe2 (CIGS) solar cells and demonstrates that the diode ideality factor is unity for band-edge emission due to direct recombination.
PHYSICAL REVIEW APPLIED
(2023)
Article
Chemistry, Physical
Jakapan Chantana, Bobur Ergashev, Yu Kawano, Yukiko Kamikawa, Shogo Ishizuka, Takashi Minemoto
Summary: CIGSe solar cells were fabricated on SLG substrates with the structure of Al/Ni/sputtered Zn(0.88)Mg(0.12)O:Al TCO/sputtered Zn1-xMgxO 2nd buffer/CdS 1st buffer/CIGSe/Mo/SLG. The impact of CBO2 between CIGSe absorber and Zn1-xMgxO 2nd buffer on cell performance and carrier recombination was investigated experimentally and theoretically. The optimization of CBO2 reduced carrier recombination, improved band bending, and increased the conversion efficiency up to 20.0%. With an antireflective coating layer, the CIGSe solar cell achieved a conversion efficiency of 21.1% with the optimized CBO2.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Shogo Ishizuka, Yukiko Kamikawa, Jiro Nishinaga
Summary: This communication presents the prospects of Cu(In,Ga)Se-2 (CIGS)-based lightweight and flexible photovoltaic devices, discusses the current status of flexible CIGS minimodules and future directions to enhance their efficiency, and explores the effects of cell separation edges on device performance.
NPJ FLEXIBLE ELECTRONICS
(2022)
