期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 7, 期 32, 页码 18898-18905出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ta05048e
关键词
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资金
- National Natural Science Foundation of China [51773213]
- China Postdoctoral Science Foundation [2017M610380]
- Key Research Program of Frontier Sciences [QYZDB-SSW-JSC047]
- Zhejiang Province Science and Technology Plan [2018C01047]
- National Youth Top-Notch Talent Program of China
Spiro-OMeTAD is a commonly used hole transport material (HTM) in regular device structures. However, a complex and uncontrollable oxygen doping process is necessary. To avoid the drawbacks of dopants, a polyelectrolyte (P3CT-BN) is introduced as a dopant-free HTM. The CO group on P3CT-BN could interact with bare Pb at the perovskite surface, which facilitates hole transfer at the perovskite/HTL interface. The P3CT-BN layer could reduce interfacial recombination and exhibits outstanding film-forming properties. Thus the efficiency of the best device is improved from 18.26% to 19.05% when replacing Spiro-OMeTAD with P3CT-BN. Moreover, devices based on P3CT-BN exhibit outstanding stability, retaining 80% of their original performance after storage in the atmosphere (30-40% relative humidity) for 1800 h without encapsulation. These results indicate that P3CT-BN can be an effective HTM to realize high efficiency and stable PSCs.
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