The Experts below are selected from a list of 8364 Experts worldwide ranked by ideXlab platform
Zhurong Liang - One of the best experts on this subject based on the ideXlab platform.
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fast preparation of uniform large grain size perovskite thin film in air condition via spray deposition method for high efficient planar solar cells
Solar Energy Materials and Solar Cells, 2017Co-Authors: Zhurong Liang, Zhisheng Chai, Hu JinAbstract:Spray deposition has been demonstrated to be a promising method to prepare perovskite thin film with many advantages, such as easy and processable under Fully ambient condition, which is suitable for large-scale production. In this work, we reveal two typical spray deposition process of rapid and slow solvent evaporation. It is emphasized that the rapid solvent evaporation process is essential to avoid dendritic crystal and obtain dense perovskite thin film without pin-holes, which can be realized with a suitable substrate temperature. With optimized spray conditions including flow rate of precursor solution and carrier gas pressure, a dense and uniform perovskite layer with Full Surface Coverage was immediately formed in similar to 5 s without any post-annealing process. The as-fabricated planar heterojunction solar cell achieved a power conversion efficiency (PCE) of 13.54% with 300 +/- 30 nm in thickness of perovskite layer. To the best of our knowledge, this result is the highest value for the CH3NH3PbI3 perovskite solar cells fabricated in air condition with high humidity up to 50%.
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a large grain size perovskite thin film with a dense structure for planar heterojunction solar cells via spray deposition under ambient conditions
RSC Advances, 2015Co-Authors: Zhurong Liang, Junxia Wang, Shaohong Zhang, Xueqing Xu, Nan Wang, Xin Wang, Zhuoneng Bi, Gang Xu, Ningyi Yuan, Jianning DingAbstract:Organometal halide perovskites have emerged as promising light absorbers for third-generation photovoltaics. Herein we developed a facile spray deposition process to prepare high-quality perovskite films without any post-annealing under ambient conditions with a high humidity of up to 50%. The as-prepared perovskite films exhibit large grain sizes up to micrometers and Full Surface Coverage. These desirable features significantly enhance the light harvesting efficiency and reduce charge recombination. Furthermore, the morphology and film thickness can be easily controlled by varying the precursor concentration or scanning times during spray deposition. The as-fabricated planar heterojunction solar cells with an optimized perovskite film thickness exhibited a power conversion efficiency of ∼7.89%, which is expected to be further improved with the increase of substrate temperature, the utilization of more compatible substrates, and the optimization of the hole-transport layer and device structure. This simple low-temperature manufacturing process provides a novel strategy for the scalable and fast fabrication of high-quality absorber layers for efficient perovskite based solar cells. The film formation mechanism regarding the nucleation and growth of perovskite films with desirable morphology is also discussed.
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a facile spray deposition route for uniform perovskite solar cells processed in air
International Photonics and OptoElectronics (2015) paper JW3A.20, 2015Co-Authors: Zhurong Liang, Junxia WangAbstract:In this work, we developed a facile spray deposition process to prepare perovskite films with Full Surface Coverage and large grain size up to micrometers under ambient condition with high humidity up to 50%.
Hu Jin - One of the best experts on this subject based on the ideXlab platform.
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fast preparation of uniform large grain size perovskite thin film in air condition via spray deposition method for high efficient planar solar cells
Solar Energy Materials and Solar Cells, 2017Co-Authors: Zhurong Liang, Zhisheng Chai, Hu JinAbstract:Spray deposition has been demonstrated to be a promising method to prepare perovskite thin film with many advantages, such as easy and processable under Fully ambient condition, which is suitable for large-scale production. In this work, we reveal two typical spray deposition process of rapid and slow solvent evaporation. It is emphasized that the rapid solvent evaporation process is essential to avoid dendritic crystal and obtain dense perovskite thin film without pin-holes, which can be realized with a suitable substrate temperature. With optimized spray conditions including flow rate of precursor solution and carrier gas pressure, a dense and uniform perovskite layer with Full Surface Coverage was immediately formed in similar to 5 s without any post-annealing process. The as-fabricated planar heterojunction solar cell achieved a power conversion efficiency (PCE) of 13.54% with 300 +/- 30 nm in thickness of perovskite layer. To the best of our knowledge, this result is the highest value for the CH3NH3PbI3 perovskite solar cells fabricated in air condition with high humidity up to 50%.
Jianning Ding - One of the best experts on this subject based on the ideXlab platform.
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a large grain size perovskite thin film with a dense structure for planar heterojunction solar cells via spray deposition under ambient conditions
RSC Advances, 2015Co-Authors: Zhurong Liang, Junxia Wang, Shaohong Zhang, Xueqing Xu, Nan Wang, Xin Wang, Zhuoneng Bi, Gang Xu, Ningyi Yuan, Jianning DingAbstract:Organometal halide perovskites have emerged as promising light absorbers for third-generation photovoltaics. Herein we developed a facile spray deposition process to prepare high-quality perovskite films without any post-annealing under ambient conditions with a high humidity of up to 50%. The as-prepared perovskite films exhibit large grain sizes up to micrometers and Full Surface Coverage. These desirable features significantly enhance the light harvesting efficiency and reduce charge recombination. Furthermore, the morphology and film thickness can be easily controlled by varying the precursor concentration or scanning times during spray deposition. The as-fabricated planar heterojunction solar cells with an optimized perovskite film thickness exhibited a power conversion efficiency of ∼7.89%, which is expected to be further improved with the increase of substrate temperature, the utilization of more compatible substrates, and the optimization of the hole-transport layer and device structure. This simple low-temperature manufacturing process provides a novel strategy for the scalable and fast fabrication of high-quality absorber layers for efficient perovskite based solar cells. The film formation mechanism regarding the nucleation and growth of perovskite films with desirable morphology is also discussed.
Yi Yang - One of the best experts on this subject based on the ideXlab platform.
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Planar Heterojunction Perovskite Solar Cells via Vapor-Assisted Solution Process
Journal of the American Chemical Society, 2014Co-Authors: Q. Chen, H.-s. Duan, Z R Hong, Y S Liu, H. P. Zhou, H H Wang, S Luo, Yi YangAbstract:Hybrid organic/inorganic perovskites (e.g., CH3NH3PbI3) as light absorbers are promising players in the field of third-generation photovoltaics. Here we demonstrate a low-temperature vapor-assisted solution process to construct polycrystalline perovskite thin films with Full Surface Coverage, small Surface roughness, and grain size up to microscale. Solar cells based on the as-prepared films achieve high power conversion efficiency of 12.1%, so far the highest efficiency based on CH3NH3PbI3 with the planar heterojunction configuration. This method provides a simple approach to perovskite film preparation and paves the way for high reproducibility of films and devices. The underlying kinetic and thermodynamic parameters regarding the perovskite film growth are discussed as well.
Yaohua Mai - One of the best experts on this subject based on the ideXlab platform.
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hysteretic behavior upon light soaking in perovskite solar cells prepared via modified vapor assisted solution process
ACS Applied Materials & Interfaces, 2015Co-Authors: Chong Liu, Jiandong Fan, Xing Zhang, Yanjiao Shen, Lin Yang, Yaohua MaiAbstract:Recently, the organic–inorganic hybrid perovskite solar cells exhibit rapidly rising efficiencies, while anomalous hysteresis in perovskite solar cells remains unsolvable. Herein, a high-quality perovskite thin film is prepared by a modified vapor-assisted solution process, which is a simple but well-controllable method proven to be capable of producing a thin film with Full Surface Coverage and grain size up to micrometers. The as-fabricated perovskite solar cell has efficiency as high as 10.2%. The hysteresis effects of both planar and mesoscopic TiO2-based perovskite solar cells have been comprehensively studied upon illumination. The results demonstrate that mesoporous-based perovskite cells combined with remarkable grain size are subject to alleviating the hysteresis effects in comparison to the planar cells. Likewise, mesoscopic TiO2-based perovskite cells perform independently of illumination and bias conditions prior to the measurements, whereas the planar cells display a reversible behavior of il...
