Bottom‐Up Quasi‐Epitaxial Growth of Hybrid Perovskite from Solution Process—Achieving High‐Efficiency Solar Cells via Template​‐Guided Crystallization

Hengkai Zhang; Minchao Qin; Zhiliang Chen; Wei Yu; Zhiwei Ren; Kuan Liu; Jiaming Huang; Yaokang Zhang; Qiong Liang; Hrisheekesh Thachoth Chandran; Patrick W. K. Fong; Zijian Zheng; Xinhui Lu; Gang Li

doi:10.1002/adma.202100009

journal article·2021-06Open access

Bottom‐Up Quasi‐Epitaxial Growth of Hybrid Perovskite from Solution Process—Achieving High‐Efficiency Solar Cells via Template‐Guided Crystallization

Hengkai Zhang, Minchao Qin, Zhiliang Chen, Wei Yu, Zhiwei Ren, Kuan Liu, Jiaming Huang, Yaokang Zhang, Qiong Liang, Hrisheekesh Thachoth Chandran, Patrick W. K. Fong, Zijian Zheng, Xinhui Lu, Gang Li

Advanced Materials· Volume 33· Issue 22

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Abstract

Abstract Epitaxial growth gives the highest‐quality crystalline semiconductor thin films for optoelectronic devices. Here, a universal solution‐processed bottom‐up quasi‐epitaxial growth of highly oriented α‐formamidinium lead triiodide (α‐FAPbI₃) perovskite film via a two‐step method is reported, in which the crystal orientation of α‐FAPbI₃ film is precisely controlled through the synergetic effect of methylammonium chloride and the large‐organic cation butylammonium bromide. In situ GIWAXS visualizes the BA‐related intermediate phase formation at the bottom of film, which serves as a guiding template for the bottom‐up quasi‐epitaxial growth in the subsequent annealing process. The template‐guided epitaxially grown BAFAMA perovskite film exhibits increased crystallinity, preferred crystallographic orientation, and reduced defects. Moreover, the BAFAMA perovskite solar cells demonstrate decent stability, maintaining 95% of their initial power conversion efficiency after 2600 h ambient storage, and 4‐time operation condition lifetime enhancement.

Source: crossref · Quality: baseline

Research context

Electronic materials Materials processing

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

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

Affiliations

Department of Electronic and Information Engineering Research Institute for Smart Energy (RISE) The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong China

Shenzhen Research Institute The Hong Kong Polytechnic University Shenzhen 518057 China

Department of Physics The Chinese University of Hong Kong New Territories Hong Kong China

State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian National Laboratory for Clean Energy Dalian Liaoning 116023 China

Laboratory for Advanced Interfacial Materials and Devices Research Centre for Smart Wearable Technology Institute of Textiles and Clothing The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong China

Funding

Science, Technology and Innovation Commission of Shenzhen Municipality · Hong Kong Polytechnic University

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