High-Performance Inverted Perovskite Solar Cells Using Doped Poly(triarylamine) as the Hole Transport Layer
- Authors
- Liu, Yawen; Liu, Zhihai; Lee, Eun-Cheol
- Issue Date
- Mar-2019
- Publisher
- AMER CHEMICAL SOC
- Keywords
- perovskite solar cells; doping; stability; hole transport layer; CuSCN; CuI; PTAA
- Citation
- ACS APPLIED ENERGY MATERIALS, v.2, no.3, pp.1932 - 1942
- Journal Title
- ACS APPLIED ENERGY MATERIALS
- Volume
- 2
- Number
- 3
- Start Page
- 1932
- End Page
- 1942
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/1802
- DOI
- 10.1021/acsaem.8b02047
- ISSN
- 2574-0962
- Abstract
- Organolead trihalide perovskite materials have attracted considerable interest because of their successful application in fabricating high-efficiency photovoltaic cells. Charge transport layers play a significant role in improving the efficiency and stability of perovskite solar cells (PSCs). In this work, we investigated the p-type doping effect of the poly(triarylamine) (PTAA) layer on the performance of PSCs by using three dopants. We observe that doping copper(I) thiocyanate (CuSCN) into PTAA led to a higher performance improvement for the PSCs than the use of copper(I) iodide (CuI) or lithium salt (Li-TFSI) as the dopant. The power conversion efficiency (PCE) of the PSCs significantly improved from 14.22% to 18.16% upon doping 2.0 wt % CuSCN with simultaneously enhanced open-circuit voltage, short-circuit current density, and fill factor. The long-term stability of the PSCs was also improved with significantly reduced PCE degradation (from 79% to 25%) after 200 h. Our results provide a simple method to improve the performance of planar PSCs by adding dopants into PTAA.
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