journal article·2018-11-21

In Situ Grain Boundary Modification via Two-Dimensional Nanoplates to Remarkably Improve Stability and Efficiency of Perovskite Solar Cells

Xuejie Zhu, Shengnan Zuo, Zhou Yang, Jiangshan Feng, Ziyu Wang, Xiaorong Zhang, Shashank Priya, Shengzhong Frank Liu, Dong Yang

ACS Applied Materials & Interfaces· Volume 10· Issue 46
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Abstract

Even though a record efficiency of 23.3% has been achieved in organic-inorganic hybrid perovskite solar cells, their stability remains a critical issue, which greatly depends on the morphology of perovskite absorbers. Herein, we report a practical grain boundary modification to remarkably improve the humidity and thermal stability by gradually growing in situ two-dimensional nanoplates between the grain boundaries of perovskite films using phenylethylammonium iodide (PEAI). The experimental results show that PEAI nanoplates play a critical role in stabilizing perovskite thin films by reducing the moisture sensitivity and suppressing phase transition at the grain boundaries. In addition to the significant improved ambient stability, the grain boundary modification by PEAI can effectively suppress the nonradiative charge recombination at grain boundaries. As a result, the efficiency of perovskite solar cells is up to 20.34% with significant humidity and thermal stability.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Organic Electronics and Photovoltaics

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

Affiliations

Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; Shaanxi Key Laboratory for Advanced Energy Devices; Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, China

Dalian National Laboratory for Clean Energy, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China

Materials Science and Engineering, Penn State, University Park, Pennsylvania 16802, United States

Funding

Division of Industrial Innovation and Partnerships · Ministry of Education of the People's Republic of China · Ministry of Science and Technology of the People's Republic of China · Air Force Office of Scientific Research · National Natural Science Foundation of China · Central Committee of the Communist Party of China · Shaanxi Province

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