journal article·2019-01-11

Facet-Dependent Control of PbI2 Colloids for over 20% Efficient Perovskite Solar Cells

Chenxin Ran, Weiyin Gao, Nengxu Li, Yingdong Xia, Qi Li, Zhaoxin Wu, Huanping Zhou, Yonghua Chen, Minqiang Wang, Wei Huang

ACS Energy Letters· Volume 4· Issue 1
Publisher page

Abstract

Organic–inorganic hybrid perovskite-based solar cells (PSCs) have made impressive progress during the past few years, and record power conversion efficiency over 23% has been achieved. However, for solution-processed perovskite films, one of the major challenges for film quality improvement is the lack of a regulation strategy for the colloids in the precursor solution. Here, we demonstrate facet-dependent colloid engineering to adjust the quality of a perovskite film and its photovoltaic performance. This is realized by the development of a facet passivation strategy to synthesize PbI2 (S-PbI2) with tunable morphology. Further, facet-dependent PbI2 colloid regulation is demonstrated, and the relations among the morphology of the PbI2 crystal, features of PbI2 colloids, the morphology of the PbI2 film, and the photovoltaic performance of MAPbI3 are established. The PSCs based on 10% S-PbI2 exhibited a best PCE of 20.22% with improved device reproducibility and hysteresis index compared to that using commercial PbI2 (∼18%).
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Electronic Science and Technology, School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, People’s Republic of China

Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, People’s Republic of China

Key Laboratory of Flexible Electronics (KLOFE) & Institution of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), Nanjing 211816, Jiangsu, People’s Republic of China

Physical Science Division, IBM TJ Watson Research Center, Yorktown Heights, New York 10598, United States

Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China

Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), Xi’an 710072, Shaanxi, People’s Republic of China

Funding

Ministry of Education of the People's Republic of China · Ministry of Science and Technology of the People's Republic of China · Natural Science Foundation of Beijing Municipality · China Postdoctoral Science Foundation · Natural Science Foundation of Jiangsu Province · Government of Jiangsu Province · China Scholarship Council · National Natural Science Foundation of China · Central Committee of the Communist Party of China

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