Tuning the work function of indium-tin-oxide electrodes for low-temperature-processed, titanium-oxide-free perovskite solar cells
- Authors
- Xie, Xiaoyin; Liu, Guanchen; Xu, Chongyang; Li, Shuangcui; Liu, Zhihai; Lee, Eun-Cheol
- Issue Date
- May-2017
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Low temperature processing; Titanium oxide free; Perovskite solar cells; Work function tuning; Small hysteresis
- Citation
- ORGANIC ELECTRONICS, v.44, pp.120 - 125
- Journal Title
- ORGANIC ELECTRONICS
- Volume
- 44
- Start Page
- 120
- End Page
- 125
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/6131
- DOI
- 10.1016/j.orgel.2017.02.011
- ISSN
- 1566-1199
- Abstract
- In this work, low-temperature-processed, titanium-oxide-free perovskite solar cells (PSCs) with power conversion efficiency (12.2%) comparable to that of titanium-oxide-based PSCs were fabricated. The fabricated PSCs exhibited a small hysteresis owing to the two-step preparation method employed for perovskite films. A poly [(9,9-bis(3'-(N, N-dimethylamino) propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene)] (PFN)tuned indium-tin-oxide (ITO) electrode was employed as a cathode and phenyl-C61-butyric acid methyl ester (PCBM) was used as an electron transport layer. Owing to the formation of surface dipoles, the work function of the ITO electrode could be tuned from -4.75 eV to -4.12 eV, which is more efficient for electron collection. Our proposed method significantly lowers the PSC processing temperature from 500 degrees C to 100 degrees C, which is advantageous for commercialization of PSCs and fabrication of flexible PSCs. (C) 2017 Elsevier B. V. All rights reserved.
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