Simultaneous Improvement in Efficiency and Stability of Low-Temperature-Processed Perovskite Solar Cells by Interfacial Control
- Authors
- Azmi, Randi; Lee, Chang-Lyoul; Jung, In Hwan; Jang, Sung-Yeon
- Issue Date
- May-2018
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- long-term air stability; low-temperature processing; perovskite solar cells; surface defects; zinc oxide
- Citation
- ADVANCED ENERGY MATERIALS, v.8, no.14
- Indexed
- SCIE
SCOPUS
- Journal Title
- ADVANCED ENERGY MATERIALS
- Volume
- 8
- Number
- 14
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/16961
- DOI
- 10.1002/aenm.201702934
- ISSN
- 1614-6832
- Abstract
- In most current state-of-the-art perovskite solar cells (PSCs), high-temperature (approximate to 500 degrees C)-sintered metal oxides are employed as electron-transporting layers (ETLs). To lower the device processing temperature, the development of low-temperature-processable ETL materials (such as solution-processed ZnO) has received growing attention. However, thus far, the use of solutionprocessed ZnO is limited because the reverse decomposition reaction that occurs at ZnO/perovskite interfaces significantly degrades the charge collection and stability of PSCs. In this work, the reverse decomposition reaction is successfully retarded by sulfur passivation of solution-processed ZnO. The sulfur passivation of ZnO by a simple chemical means, efficiently reduces the oxygen-deficient defects and surface oxygen-containing groups, thus effectively preventing reverse decomposition reactions during and after formation of the perovskite active layers. Using the low-temperature-processed sulfurpassivated ZnO (ZnO-S), perovskite layers with higher crystallinity and larger grain size are obtained, while the charge extraction at the ZnO/perovskite interface is significantly improved. As a result, the ZnO-S-based PSCs achieve substantially improved power-conversion-efficiency (PCE) (19.65%) and long-term air-storage stability (90% retention after 40 d) compared with pristine ZnO-based PSCs (16.51% and 1% retention after 40 d). Notably, the PCE achieved is the highest recorded (19.65%) for low-temperature ZnObased PSCs.
- Files in This Item
-
Go to Link
- Appears in
Collections - 서울 공과대학 > 서울 유기나노공학과 > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/16961)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.