Article
Chemistry, Physical
Kritsada Hongsith, Natthakrit Subtim, Arucha Aryaruknukul, Rangsan Panyathip, Wakul Bumrungsan, Sukrit Sucharitakul, Surachet Phadungdhitidhada, Supab Choopun
Summary: This study investigates the use of nickel compound quantum dots prepared via electrochemical process as hole transporting layer (HTL) in perovskite solar cells (PSCs). The NiO films prepared from these quantum dots show improved power conversion efficiency and higher stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Energy & Fuels
Zaydoon Tariq M. Noori, Amel Muhson Naji, Olfat A. Nief, Mustafa K. A. Mohammed, Naser M. Ahmed, Sangeeta Singh
Summary: A novel and low-cost hole transport layer (HTL) for hybrid perovskite solar cells (HPSCs) was developed by doping nickel oxide nanoparticles into polyaniline, improving device efficiency and stability.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
E. Erdenebileg, N. Tiwari, F. U. Kosasih, H. A. Dewi, L. Jia, N. Mathews, S. Mhaisalkar, A. Bruno
Summary: Metal oxides, such as non-stoichiometric nickel oxide (NiOx), have been widely used in thin film solar cells for their suitable energy band levels, high charge carrier mobilities, and excellent stability. In this study, we demonstrate the fabrication of co-evaporated perovskite solar cells (PSCs) with sputtered NiOx as the hole transport layer. We investigate the impact of sputtering conditions on the physical properties of NiOx and achieve highly efficient PSCs using optimized conditions.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Materials Science, Ceramics
Mohammad Nazeri, Mohammad Reza Golobostanfard, Hamoon Kheirabadi, Hossein Abdizadeh
Summary: This article provides an overview of the diverse types of Hole Transport Materials (HTMs) used in various types of Perovskite Solar Cells (PSCs), from organic to inorganic, with a focus on oxide and sulfide inorganic HTMs. The physical properties, synthesis, and applications of these materials in different PSC structures are investigated, aiming to encourage further research and optimization of these materials.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Shuangjie Wang, Yuke Li, Jiabao Yang, Tong Wang, Bowen Yang, Qi Cao, Xingyu Pu, Lioz Etgar, Jian Han, Junsong Zhao, Xuanhua Li, Anders Hagfeldt
Summary: The use of high-quality NiOx nanoparticles synthesized with the assistance of an ionic liquid improves the conductivity and hole-extraction ability of the hole transport layer in inverted perovskite solar cells, resulting in enhanced device performance and stability.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Engineering, Environmental
Pei-Huan Lee, Ting-Tzu Wu, Chia-Feng Li, Damian Glowienka, Yi-Hsuan Sun, Yi-Ting Lin, Hung-Wei Yen, Cheng-Gang Huang, Yulia Galagan, Yu-Ching Huang, Wei-Fang Su
Summary: A facile emulsion process was used to synthesize highly crystalline, low temperature deposition NiOx nanoparticles as a hole transport layer for perovskite solar cells. The smaller size and excellent stability of the NiOX nanoparticles prepared by this method contributed to a higher power conversion efficiency of the solar cells. This work has the potential to lead to large-scale production of PVSCs with high energy conservation.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Rui Liu, Yue Yu, Taotao Hu, Fu Zhang, Chang Liu, Hongming Hou, Meng Zhang, Xin Chen, Hua Yu
Summary: This study demonstrates the use of sol-gel method to prepare ideal wetting surface NiOx as a HTM, which can improve the power conversion efficiency of quasi two-dimensional perovskite solar cells, providing a promising alternative to organic polymer HTM materials.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Multidisciplinary
Chih-Yu Chang, You-Wei Wu, Sheng-Hsiung Yang, Ibrahim Abdulhalim
Summary: In this study, a new method was developed to prepare hole transport layers (HTLs) for solar cells, which possess high conductivity, charge extraction ability, and carrier transport capability. The addition of nanoflake layer resulted in perovskite films with larger grain sizes and fewer boundaries, leading to improved efficiency and stability of the solar cells.
Article
Energy & Fuels
Wei-Shiuan Tseng, Jheng-Siou Hung, Zheng-Yue Jian, Jian-Zhi Huang, Jin-Bin Yang, Wei-Hsuan Hsu, Chih- Wu, Xue Li Huang, Mei-Hsin Chen
Summary: Recent research has shown that nickel oxide (NiOx) thin films can be used as an efficient and stable hole transport layer (HTL) in inverted planar perovskite solar cells (PSCs), replacing costly and chemically unstable organic materials. In this study, annealing-free Al-doped NiOx nano-particles (NPs) were synthesized and applied as a HTL in PSCs, resulting in significant improvements in electrical conductivity, morphology, external quantum efficiency, and power conversion efficiency.
Article
Chemistry, Multidisciplinary
S. Park, C. Lee, C. Lee, T. Kim, Y. Ko, Y. Jun
Summary: Inorganic CSPI3 perovskite has gained significant attention in next-generation perovskite solar cells (PSCs) due to its suitable optical band gap and high thermal and chemical stability. However, it quickly transforms into an undesired nonperovskite yellow phase, making stabilization crucial. This paper presents an efficient method using Mn(TFSI)2 as a dopant to reduce interfacial defects and improve power conversion efficiency and long-term stability of PSCs.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
Gisung Kim, Namhee Kwon, Dongho Lee, Mijoung Kim, Moonhoe Kim, Yongjei Lee, WooJong Kim, Daseul Hyeon, Bora Kim, Mun Seok Jeong, Jinpyo Hong, JungYup Yang
Summary: Recent studies have found that copper (I) thiocyanate (CuSCN) has significant potential as a hole extraction material for perovskite solar cells. However, the use of CuSCN can lead to unwanted dissociation of MAPbI(3) to PbI2, and the solvent DES can damage the surface of the perovskite layer. By increasing the molar ratio of MAI in the MAPbI(3) precursor solution, the surface damage to MAPbI(3) can be reduced and the dissociation to PbI2 can be effectively suppressed.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Riva Alkarsifi, Yatzil Alejandra Avalos-Quiroz, Pavlo Perkhun, Xianjie Liu, Mats Fahlman, Anil Kumar Bharwal, Carmen M. Ruiz, David Duche, Jean-Jacques Simon, Christine Videlot-Ackermann, Olivier Margeat, Joerg Ackermann
Summary: In this study, copper-doped nickel oxide nanocrystals were utilized to form stable inks for efficient hole transport layers in polymer solar cells. By doping the nanocrystals with an organic electron acceptor, the work function was optimized for efficient hole extraction in solar cells based on both fullerene and non-fullerene acceptors. The resulting hybrid hole transport layers showed comparable efficiencies to standard PEDOT:PSS layers and could also be used for color tuning in polymer solar cells.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Yali Liu, Tianfei Xu, Zhuo Xu, Hao Zhang, Tengteng Yang, Zezhang Wang, Wanchun Xiang, Shengzhong Liu
Summary: The addition of biocompatible material tryptamine (TA) in the hole transporting layer (HTL) improves surface defects and moisture stability of inorganic perovskite films in metal halide solar cells. This strategy significantly enhances the open circuit voltage and power conversion efficiency of the devices, and increases the stability of the cells in humid environments.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yu Fu, Xingchong Liu, Shuangshuang Zhao
Summary: The inferior interface feature of Nickel oxide (NiOx) inverted perovskite solar cells often causes poor device property and repeatability. In this study, Mandelic acid (MAD) is introduced to form a modified layer, which improves the interface properties and increases the hydrophobicity. The introduction of MAD molecule decreases the trap state density and significantly improves the power conversion efficiency of the solar cells.
Article
Nanoscience & Nanotechnology
Anat Itzhak, Xu He, Adi Kama, Sujit Kumar, Michal Ejgenberg, Antoine Kahn, David Cahen
Summary: Using RF sputtering to fabricate NiOx and covering it with a NiyN layer in vacuum can improve the efficiency and stability of solar cells.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Energy & Fuels
Yuniu Zhang, Dou Luo, Chengwei Shan, Qian Liu, Xiaoyu Gu, Wenhui Li, Wallace C. H. Choy, Aung Ko Ko Kyaw
Summary: The study utilizes a nonfused ring acceptor to improve the efficiency of semitransparent organic solar cells (STOSCs), leading to a best PCE of 13.19%. By optimizing the proportion of the third component, STOSCs exhibit improved electrical and optical properties, achieving an AVT of 24.56%.
Review
Energy & Fuels
Di Zhang, Abdul Hai Alami, Wallace C. H. Choy
Summary: The rapid development of smart and wearable electronics has led to a demand for flexible, lightweight, and affordable optoelectronics. This overview discusses the recent development of metal-based transparent electrodes for flexible organic and perovskite photovoltaics, highlighting both the challenges and opportunities in the field.
Article
Chemistry, Multidisciplinary
Ruijia Zhang, Zengqi Huang, Weipeng Chen, Benzheng Lyu, Hong Zhang, Xinjun He, Xiaotian Hu, Yanlin Song, Wallace C. H. Choy
Summary: In this study, a new approach using self-assembly method to introduce a new material in solar cells has been demonstrated, which leads to improved performance of perovskite solar cells. This method can enhance energy conversion efficiency, film quality, and long-term stability of the devices.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Environmental
Hao Li, Zheng Yan, Min Li, Xiaoyan Wen, Shuo Deng, Sisi Liu, Wallace C. H. Choy, Lijie Li, Ming-Yu Li, Haifei Lu
Summary: The stability of perovskite solar cells (PSCs) is evaluated by studying the corrosion of an ultrathin silver electrode. It is found that light illumination and bias voltage can cause gradual oxidation of the silver film, leading to the generation of corrosive I2 gas. This study provides insights into the degradation mechanisms of PSCs and offers solutions for practical application.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Yuniu Zhang, Jiawei Zheng, Zhengyan Jiang, Xinjun He, Jinwook Kim, Luhang Xu, Minchao Qin, Xinhui Lu, Aung Ko Ko Kyaw, Wallace C. H. Choy
Summary: Researchers demonstrate a facile approach of introducing pre-located Ag nanoparticles (NPs) with optimized ligands to form high-performance transparent electrodes. This approach not only guides the growth of evaporated Ag clusters to form high-quality transparent electrodes, but also reduces mis-stacking defects of the electron transport layer and improves carrier transportation/extraction. By using this method, a semi-transparent organic solar cell achieves a remarkable power conversion efficiency of 12.80% and provides potential for practical applications.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Shichen Yuan, Tao Fang, Jing Huang, Xiansheng Li, Changting Wei, Yihui Zhou, Yan Li, Xin Zheng, Jinhai Huang, Jianhua Su, Glib Baryshnikov, Wallace C. H. Choy, Haibo Zeng, Bo Xu
Summary: Researchers have developed a high-mobility electron-transporting material B2 to balance charge injection in blue perovskite quantum dot light-emitting diodes (Pe-QLEDs), leading to improved device performance and stability.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Physical
Hui Liu, Lu Zhu, Hong Zhang, Xinjun He, Feng Yan, Kam Sing Wong, Wallace C. H. Choy
Summary: In this study, a tailored tin-lead perovskite structure was developed by using tin thiocyanate to form a double-sided surface-preferred distribution in the perovskite. This significantly improved the film morphology and antioxidation ability, resulting in high-performance near-infrared photodetectors.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Physical
Kaibo Liang, Yunjia Wu, Qingshui Zhen, Yu Zou, Xiuchun Zhang, Chenhao Wang, Puyao Shi, Yangyang Zhang, Weihai Sun, Yunlong Li, Jihuai Wu
Summary: CsPbBr3 perovskite solar cells with high temperature and humidity stability have attracted attention. Sequential solution-processing techniques (SSPTs) were mostly used to prepare CsPbBr3 films due to the lack of suitable solvents. However, impure phases generated during the deposition process deteriorated the device's performance. To address this, a solvent-vapor annealing (SA) method was proposed to fabricate porous PbBr2 films, leading to compact and high-quality CsPbBr3 films with large grains. The SA treated devices achieved a higher power conversion efficiency, better stability, and retained 94.28% of the original efficiency after 30 days in ambient atmosphere.
SURFACES AND INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Hongmei Zhu, Qingqian Wang, Kun Sun, Wei Chen, Jun Tang, Junjie Hao, Zhaojin Wang, Jiayun Sun, Wallace C. H. Choy, Peter Muller-Buschbaum, Xiao Wei Sun, Dan Wu, Kai Wang
Summary: The chirality of 2D chiral perovskite films has been significantly enhanced by a solvent modulation strategy, leading to the formation of CPL-active materials. By creating chiral perovskite/quantum dot composites, an increase in the CPL intensity was observed, attributed to the generation and transportation of spin-polarized charge carriers as well as the enlarged lattice distortion of the chiral perovskite films achieved through solvent modulation. This approach provides an effective way to construct CPL-active materials.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Physics, Applied
Ziyao Zhu, Huiwen Chen, Bo Zhao, Weixiong Huang, Qianqian Lin, Xuefeng Yu, Yunlong Li
Summary: Blade coating is a low-cost method for producing perovskite thick-film x-ray detectors, but it faces the challenge of sacrificing either the density or thickness of the film. This study proposes a scalable ferroelectric dipole-MAPbI(3) coupled x-ray detector, which shows a dense fibrous mesoscopic structure. The ferroelectric dipoles not only improve the crystallinity and assembly density of the detector but also decrease trap-state densities, leading to improved direct x-ray detection performance.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Fengxian Cao, Ziyao Zhu, Chunhong Zhang, Pengxu Chen, Shibo Wang, Anling Tong, Ruowei He, Ying Wang, Weihai Sun, Yunlong Li, Jihuai Wu
Summary: In this study, it is found that a novel ionic liquid, DMATFSI, can act as a bifunctional modulator for the hole transporting layer (HTL) in n-i-p perovskite solar cells (PSCs). The addition of DMATFSI stabilizes the oxidized spiro-OMeTAD(+) cation radicals and passivates defects on the perovskite surface. PSCs with DMATFSI and LiTFSI co-doped spiro-OMeTAD achieve a high power conversion efficiency of 23.22% and retain nearly 80% of their initial efficiency after 36 days of exposure to ambient air.
Article
Chemistry, Physical
Xinjun He, Christopher C. S. Chan, Xinhui Zou, Sen Zhang, Patrick Wai Keung Fong, Jinwook Kim, Gang Li, Xiaotian Hu, Wei Ma, Kam Sing Wong, Wallace C. H. Choy
Summary: Organic solar cells (OSC) require control over molecular crystal orientation, domain size, and vertical distribution to improve charge collection. To achieve this, a liquid additive is used to enhance phase separation during film formation, resulting in a favorable vertical distribution and enlarged domain size. This manipulation improves exciton/charge dynamics, leading to high fill factors and efficiency of 18.72%.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jiayun Sun, Zhenwei Ren, Zhaojin Wang, Haoran Wang, Dan Wu, Xiao Wei Sun, Wallace C. H. Choy, Kai Wang
Summary: A facile ionic liquid post-treatment technique is used to modify the solution-processed quasi-2D perovskite film, which enhances the radiative recombination efficiency and the photoluminescence quantum yield of the film. It also improves the hole injection and the external quantum efficiency of the blue PeLED.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Guanding Mei, Xiangtian Xiao, Sajjad Ahmad, Hong Lin, Yangzhi Tan, Kai Wang, Xiao Wei Sun, Wallace C. H. Choy
Summary: This study demonstrates the importance of microcavity design for improving the light extraction efficiency of Perovskite light-emitting diodes (PeLEDs). The experiment shows that a high-efficiency horizontal dipole in the microcavity is the key to improving the efficiency.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jiawei Zheng, Xinjun He, Yuniu Zhang, Benzheng Lyu, Jinwook Kim, Shiang Li, Xinhui Lu, Haibin Su, Wallace C. H. Choy
Summary: Solution-processed top electrodes using metallic nanoparticles have been proposed for the large-scale industrialization of organic solar cells (OSCs). A compact-packing-enabled fabrication approach is introduced for the efficient stacking and sintering of metallic nanoparticles, leading to high conductivity and high reflectance top electrodes. The use of gallic acid-assisted silver nanoparticles (AgNPs) results in high-quality AgNP films with uniform particle size distribution and superior storage stability, enabling the achievement of a record high efficiency of 14.69% for large-area solution-processed OSCs.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
