journal article·2020-07-27

Influence of Hole Transport Layers/Perovskite Interfaces on the Hysteresis Behavior of Inverted Perovskite Solar Cells

Jie Liu, Xingtian Yin, Yuxiao Guo, Meidan Que, Jing Chen, Zhong Chen, Wenxiu Que

ACS Applied Energy Materials· Volume 3· Issue 7
Publisher page

Abstract

A nickel oxide (NiOx) film is employed to replace poly(2,-dihydrothieno-1,4-dioxin)-poly(styrene sulfonate) (PEDOT:PSS) as the hole transport layer for inverted perovskite solar cells (PSCs) with zinc oxide as the electron transport layer, and we focus on the influence of the interface between the hole transport layer and the perovskite layer on carrier transport. The space-charge-limited current measurement and steady-state and time-resolved photoluminescence (PL) spectra indicate that the perovskite film deposited on the NiOx film has a smaller trap density than that on a PEDOT:PSS film. Additionally, the enhanced PL intensity and longer carrier lifetime imply that the perovskite film deposited on the NiOx film has poor carrier extraction efficiency, which likely results from the vast carrier accumulation at the interface. The NiOx-based PSCs show a reduced hysteresis behavior compared to the PEDOT:PSS-based PSCs, which implies that reducing the trap density in the perovskite film likely contributes more to reducing the hysteresis behavior than reducing carrier accumulation at the interface.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Organic Light-Emitting Diodes Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Electronic Materials Research Laboratory, International Center for Dielectric Research, Key Laboratory of the Ministry of Education, Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic Science and Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, People’s Republic of China

The Key laboratory for Surface Engineering and Remanufacturing in Shaanxi Province, School of Chemical Engineering, Xi’an University, Xi’an, Shaanxi 710065, People’s Republic of China

School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore

Funding

State Administration of Foreign Experts Affairs · Ministry of Education of the People's Republic of China · National Natural Science Foundation of China · Key Science and Technology Developing Project of Shaanxi Province · Special Natural Science Foundation of Science and Technology Bureau of Xi???an city

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