Solution-processable nickel-chromium ternary oxide as an efficient hole transport layer for inverted planar perovskite solar cells

Organic-inorganic hybrid perovskite solar cells (PSCs) have shown advantages of high efficiency, solution production, and flexibility, and have become a potential candidate for next-generation photovoltaic technologies. For PSCs in p-i-n configuration, inorganic p-type semiconductors are competitive...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2021-10, Vol.9 (38), p.21792-21798
Main Authors: Zheng, Yichu, Ge, Bing, Zheng, Li Rong, Hou, Yu, Yang, Shuang, Yang, Hua Gui
Format: Article
Language:English
Subjects:
Chromium
Electrical conductivity
Electrical resistivity
Electronics industry
Energy conversion efficiency
Metal oxides
Nickel
P-type semiconductors
Perovskites
Photovoltaic cells
Photovoltaics
Recombination
Solar cells
Spectroscopy
Valence band
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Organic-inorganic hybrid perovskite solar cells (PSCs) have shown advantages of high efficiency, solution production, and flexibility, and have become a potential candidate for next-generation photovoltaic technologies. For PSCs in p-i-n configuration, inorganic p-type semiconductors are competitive as hole transport layers (HTLs) due to their low-cost, chemical stability, high transparency, and solution processability. Herein, solution-processed, ternary metal oxide NiCrO 3 films were reported as HTLs in PSCs. Compared with the most prevalent NiO x HTLs, the uniform and pin-hole free NiCrO 3 HTLs delivered higher electrical conductivity and a deeper valence band, enabling improved hole transport and interfacial band alignment. The NiCrO 3 HTLs also present accelerated charge extraction and slow charge recombination as observed by transient spectroscopy studies. A high power conversion efficiency (PCE) of 19.93% was achieved, which is much higher than that of a NiO x based device (18.35%). This work demonstrated the potential of NiCrO 3 as an effective HTL in PSCs, and may promote the development of ternary metal oxides as new building blocks for high performance PSCs. Solution-processed ternary metal oxide NiCrO 3 films were developed as competitive hole transport layers in inverted perovskite solar cells with an efficiency of 19.93%.
ISSN:2050-7488
2050-7496
DOI:10.1039/d1ta06565c