Nonfullerene Electron Transporting Material Based on Naphthalene Diimide Small Molecule for Highly Stable Perovskite Solar Cells with Efficiency Exceeding 20%
- Authors
- Jung, Su-Kyo; Heo, Jin Hyuck; Lee, Dae Woon; Lee, Seung-Chul; Lee, Seung-Heon; Yoon, Woojin; Yun, Hoseop; Im, Sang Hyuk; Kim, Jong H.; Kwon, O-Pil
- Issue Date
- 16-5월-2018
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- electron transporting materials; naphthalene diimide; perovskite solar cells
- Citation
- ADVANCED FUNCTIONAL MATERIALS, v.28, no.20
- Indexed
- SCIE
SCOPUS
- Journal Title
- ADVANCED FUNCTIONAL MATERIALS
- Volume
- 28
- Number
- 20
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/75523
- DOI
- 10.1002/adfm.201800346
- ISSN
- 1616-301X
- Abstract
- This study reports a new nonfullerene electron transporting material (ETM) based on naphthalene diimide (NDI) small molecules for use in high-performance perovskite solar cells (PSCs). These solar cells simultaneously achieve high power conversion efficiency (PCE) of over 20% and long-term stability. New NDI-ID (N, N'-Bis(1-indanyl) naphthalene-1,4,5,8-tetracarboxylic diimide) consisting of an N-substituted indane group having simultaneous alicyclic and aromatic characteristics is synthesized by a low-cost, one-step reaction, and facile purification method. The partially flexible characteristics of an alicyclic cyclopentene group on indane groups open the possibility of low-temperature solution processing. The conformational rigidity and aromaticity of phenyl and alicyclic groups contribute to high temporal stability by strong secondary bonds. NDI-ID has herringbone packed semiconducting NDI cores that exhibit up to 0.2 cm(2) V-1 s(-1) electron mobility in field effect transistors. The inverted PSCs based on CH(NH2)(2)PbI3-xBrx with NDI-ID ETM exhibit very high PCEs of up to 20.2%, which is better than that of widely used PCBM (phenyl-C61-butyric acid methyl ester) ETM-based PSCs. Moreover, NDI-ID-based PSCs exhibit very high long-term temporal stability, retaining 90% of the initial PCE after 500 h at 100 degrees C with 1 sun illumination without encapsulation. Therefore, NDI-ID is a promising ETM for highly efficient, stable PSCs.
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Collections - College of Engineering > Department of Chemical and Biological Engineering > 1. Journal Articles
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