journal article·2021-07-21

Formamidine Acetate Induces Regulation of Crystallization and Stabilization in Sn-Based Perovskite Solar Cells

Ruoyao Xu, Hua Dong, Peizhou Li, Xiangrong Cao, Haomiao Li, Jingrui Li, Zhaoxin Wu

ACS Applied Materials & Interfaces· Volume 13· Issue 28
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Abstract

Sn-based perovskite solar cells (PSCs) have received extensive attention for photovoltaic applications. Nevertheless, the low crystallization quality of the film due to rapid crystallization results in high trap density of states, which is one of the main reasons for poor performance of Sn-based PSC devices. In this work, we developed a strategy for the formation of FASnI3 perovskites by introducing the addition of formamidine acetate (FAAc). Benefiting from the iodide-coordinated cation (FA+) and crystallization-regulated anion (AC–), FAAc could achieve the high-quality films with suppressed defects. The champion power conversion efficiency (PCE) of FAAc-modified PSC devices reached 9.96%, reserving 82% of their initial PCE of the light aging test over 1500 h. We hope that our finding could provide implications on the high-performance and stable Sn-based PSCs.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Organic Light-Emitting Diodes Research

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

Affiliations

Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, China

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

Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education and International Center for Dielectric Research, School of Electronic and Information Engineering, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, China

Funding

China Postdoctoral Science Foundation · National Natural Science Foundation of China · Natural Science Basic Research Plan in Shaanxi Province of China

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