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Amino-capped zinc oxide modified tin oxide electron transport layer for efficient perovskite solar cells

DOI: 10.1016/j.xcrp.2021.100590 DOI Help

Authors: Rongjun Zhao (Yunnan University) , Linqin Wang (Westlake University) , Jing Huang (KTH-Royal Institute of Technology) , Xiaohe Miao (Westlake Institute for Advanced Study) , Licheng Sun (Westlake University) , Yong Hua (Yunnan University) , Yude Wang (Yunnan University)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Cell Reports Physical Science , VOL 517

State: Published (Approved)
Published: September 2021
Diamond Proposal Number(s): 20805

Open Access Open Access

Abstract: Electron transport layer (ETL)/perovskite interface passivation is particularly challenging because of the use of polar solvents (e.g., DMF) for perovskite solution deposition, which usually destroy the bottom as-formed defect passivation layers. Herein, a novel multifunctional composite ETL, NH2-ZnO@SnO2, is prepared by mixing amino-capped ZnO (NH2-ZnO) nanocrystals (NCs) with SnO2 nanoparticles. The best-performing PSCs on the basis of NH2-ZnO@SnO2 achieve efficiency of 22.52%, which is significantly higher than that of the pristine SnO2 counterpart (18.45%). The enhanced performance of the NH2-ZnO@SnO2 ETL can be attributed to higher electron extraction capacity, better energy-level alignment with perovskite material, and more efficient carrier transport in device. Most important, the NH2 groups on the surface of ZnO NCs can effectively passivate the under-coordinated Pb2+ ions from perovskite films, thus reducing charge recombination at ETL/perovskite interface. The results suggest that NH2-ZnO NCs@SnO2 composite is a promising ETL for improving the performance of PSCs.

Journal Keywords: electron transport layer; SnO2; perovskite solar cell; nanocrystals; charge transport; carrier dynamics

Diamond Keywords: Photovoltaics; Semiconductors

Subject Areas: Materials, Chemistry

Instruments: I19-Small Molecule Single Crystal Diffraction

Added On: 04/10/2021 09:18


Discipline Tags:

Physical Chemistry Earth Sciences & Environment Climate Change Energy Sustainable Energy Systems Materials Science Metallurgy Perovskites Chemistry

Technical Tags:

Diffraction Single Crystal X-ray Diffraction (SXRD)