Affiliation:
1. Anhui Province Key Laboratory of Optoelectric Materials Science and Technology College of Physics and Electronic Information Anhui Normal University Wuhu 241002 P. R. China
2. School of Physics and Electronic Science Zunyi Normal College Zunyi 563002 P. R. China
3. Shanghai Aerospace Electronics Technology Institute Shanghai 201108 P. R. China
4. National Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 P. R. China
Abstract
Nickel oxide (NiO
x
) is one of the most widely used inorganic hole transport materials for inverted perovskite solar cells (PSCs), which has the advantages of low cost, easy preparation, and good stability. However, the energy‐level mismatch and interfacial redox reactions at the NiO
x
/perovskite interface limit the performance of NiO
x
‐based PSCs. Herein, triphenylamine‐2,1,3‐benzothiadiazole‐triphenylamine (TBT) small‐molecule material is first used as an interfacial modification layer between NiO
x
and perovskite. The deposition of TBT on NiO
x
helps to hinder the contact between NiO
x
and perovskite, improves the electrical conductivity, passivates interfacial defects, and inhibits the recombination of interfacial carriers. TBT makes the valance band top energy level of NiO
x
better match that of perovskite and promotes the hole transfer at NiO
x
/perovskite interface, and the hole transfer rate increases from 2.19 × 1010 to 4.12 × 1010 s−1. The TBT‐based device obtains a champion power conversion efficiency (PCE) of 21.84%, much higher than the control device (18.62%). Furthermore, the optimized device which is conserved in 30 ± 5% relative humidity and 25 °C environments more than 1000 h retains 90% of the initial efficiency. A effective strategy to improve the PCE and stability of NiO
x
‐based PSCs is provided.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Anhui Province
Subject
Electrical and Electronic Engineering,Energy Engineering and Power Technology,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Cited by
3 articles.
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