https://scholars.lib.ntu.edu.tw/handle/123456789/575006
Title: | Achieving High-Performance Perovskite Photovoltaic by Morphology Engineering of Low-Temperature Processed Zn-Doped TiO<inf>2</inf> Electron Transport Layer | Authors: | Wu, M.-C. Lin, Y.-T. Chen, S.-H. Jao, M.-H. Chang, Y.-H. Lee, K.-M. Lai, C.-S. Chen, Y.-F. Su, W.-F. YANG-FANG CHEN |
Keywords: | morphology; perovskites; solar cells; spray coating; TiO2 | Issue Date: | 2020 | Journal Volume: | 16 | Journal Issue: | 41 | Start page/Pages: | - | Source: | Small | Abstract: | Perovskite solar cells (PSCs) have become one of the most promising renewable energy converting devices. However, in order to reach a sufficiently high power conversion efficiency (PCE), the PSCs typically require a high-temperature sintering process to prepare mesostructured TiO2 as an efficient electron transport layer (ETL), which prohibits the PSCs from commercialization in the future. This work investigates a low-temperature synthesis of TiO2 nanocrystals and introduces a two-fluid spray coating process to produce a nanostructured ETL for the following deposition of perovskite layer. The temperature during the whole deposition process can be maintained under 150 °C. Compared to the typical planar TiO2 layer, the perovskite layer fabricated on a nanostructured TiO2 layer shows uniform compactness, preferred orientation, and high crystallinity, leading to reproducible and promising device performance. The detail mechanisms are revealed by the contact angle test, morphology characterization, grazing incident wide angle X-Ray scattering measurement, and space charge limited currents analysis. Finally, optimized device performance can be achieved through adequate Zn doping in the TiO2 layer, demonstrating an average PCE of 19.87% with champion PCE of 21.36%. The efficiency can maintain over 80% of its original value after 3000 h storage in ambient atmosphere. This study suggests a promising approach to offer high-efficiency PSCs using the low-temperature process. © 2020 Wiley-VCH GmbH |
URI: | https://www.scopus.com/inward/record.url?eid=2-s2.0-85091174435&partnerID=40&md5=ae5a61b6617f6fb3b6257eba22bdf02f https://scholars.lib.ntu.edu.tw/handle/123456789/575006 |
DOI: | 10.1002/smll.202002201 | SDG/Keyword: | Contact angle; Conversion efficiency; Crystallinity; Deposition; Electron transport properties; Low temperature effects; Morphology; Perovskite; Perovskite solar cells; Temperature; Titanium dioxide; X ray scattering; Electron transport layers; High-temperature sintering; Low temperature synthesis; Low- temperature process; Morphology characterizations; Preferred orientations; Space charge limited currents; Spray coating process; High temperature engineering |
Appears in Collections: | 物理學系 |
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