Enhanced Crystallinity of Triple-Cation Perovskite Film via Doping NH4SCN

Ziji Liu; Detao Liu; Hao Chen; Long Ji; Hualin Zheng; Yiding Gu; Feng Wang; Zhi Chen; Shibin Li

doi:10.1186/s11671-019-3134-4

Nanoscale Research Letters (Sep 2019)

Enhanced Crystallinity of Triple-Cation Perovskite Film via Doping NH4SCN

Ziji Liu,
Detao Liu,
Hao Chen,
Long Ji,
Hualin Zheng,
Yiding Gu,
Feng Wang,
Zhi Chen,
Shibin Li

Affiliations

Ziji Liu: State Key Laboratory of Electronic Thin Films and Integrated Devices, and School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC)
Detao Liu: State Key Laboratory of Electronic Thin Films and Integrated Devices, and School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC)
Hao Chen: State Key Laboratory of Electronic Thin Films and Integrated Devices, and School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC)
Long Ji: State Key Laboratory of Electronic Thin Films and Integrated Devices, and School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC)
Hualin Zheng: State Key Laboratory of Electronic Thin Films and Integrated Devices, and School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC)
Yiding Gu: State Key Laboratory of Electronic Thin Films and Integrated Devices, and School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC)
Feng Wang: State Key Laboratory of Electronic Thin Films and Integrated Devices, and School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC)
Zhi Chen: State Key Laboratory of Electronic Thin Films and Integrated Devices, and School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC)
Shibin Li: State Key Laboratory of Electronic Thin Films and Integrated Devices, and School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC)

DOI: https://doi.org/10.1186/s11671-019-3134-4
Journal volume & issue: Vol. 14, no. 1
pp. 1 – 7

Abstract

Read online

Abstract The trap-state density in perovskite films largely determines the photovoltaic performance of perovskite solar cells (PSCs). Increasing the crystal grain size in perovskite films is an effective method to reduce the trap-state density. Here, we have added NH4SCN into perovskite precursor solution to obtain perovskite films with an increased crystal grain size. The perovskite with increased crystal grain size shows a much lower trap-state density compared with reference perovskite films, resulting in an improved photovoltaic performance in PSCs. The champion photovoltaic device has achieved a power conversion efficiency of 19.36%. The proposed method may also impact other optoelectronic devices based on perovskite films.

Published in Nanoscale Research Letters

ISSN: 1931-7573 (Print); 1556-276X (Online)
Publisher: SpringerOpen
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.springer.com/journal/11671

About the journal

Abstract

Keywords