Enhancing the Photovoltaic Performance of Perovskite Solar Cells with a Down-Conversion Eu-Complex

Ling Jiang; Wangchao Chen; Jiawei Zheng; Liangzheng Zhu; Li'e Mo; Zhaoqian Li; Linhua Hu; Tasawar Hayat; Ahmed Alsaedi; Changneng Zhang; Songyuan Dai

doi:10.1021/acsami.7b10101

Enhancing the Photovoltaic Performance of Perovskite Solar Cells with a Down-Conversion Eu-Complex

ACS Appl Mater Interfaces. 2017 Aug 16;9(32):26958-26964. doi: 10.1021/acsami.7b10101. Epub 2017 Aug 2.

Authors

Ling Jiang^{1

2}, Wangchao Chen^{1

2}, Jiawei Zheng^{1

2}, Liangzheng Zhu^{1

2}, Li'e Mo¹, Zhaoqian Li¹, Linhua Hu¹, Tasawar Hayat³, Ahmed Alsaedi³, Changneng Zhang¹, Songyuan Dai⁴

Affiliations

¹ Key Laboratory of Photovolatic and Energy Conservation Materials, Institute of Applied Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei, Anhui 230088, P. R. China.
² University of Science and Technology of China , Hefei, 230026, P. R. China.
³ NAAM Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University , Jeddah 21589, Saudi Arabia.
⁴ Beijing Key Laboratory of Novel Thin Film Solar Cells, North China Electric Power University , Beijing, 102206, P. R. China.

PMID: 28753267
DOI: 10.1021/acsami.7b10101

Abstract

Organometal halide perovskite solar cells (PSCs) have shown high photovoltaic performance but poor utilization of ultraviolet (UV) irradiation. Lanthanide complexes have a wide absorption range in the UV region and they can down-convert the absorbed UV light into visible light, which provides a possibility for PSCs to utilize UV light for higher photocurrent, efficiency, and stability. In this study, we use a transparent luminescent down-converting layer (LDL) of Eu-4,7-diphenyl-1,10-phenanthroline (Eu-complex) to improve the light utilization efficiency of PSCs. Compared with the uncoated PSC, the PSC coated with Eu-complex LDL on the reverse of the fluorine-doped tin oxide glass displayed an enhancement of 11.8% in short-circuit current density (J_sc) and 15.3% in efficiency due to the Eu-complex LDL re-emitting UV light (300-380 nm) in the visible range. It is indicated that the Eu-complex LDL plays the role of enhancing the power conversion efficiency as well as reducing UV degradation for PSCs.

Keywords: Eu-complex; UV stability; down-conversion; luminescent; perovskite solar cells.