標題: Single-Junction Organic Solar Cell Containing a Fluorinated Heptacyclic Carbazole-Based Ladder-Type Acceptor Affords over 13% Efficiency with Solution-Processed Cross-Linkable Fullerene as an Interfacial Layer
作者: Chen, Tsung-Wei
Chang, Chia-Chih
Hsiao, Yu-Tang
Chan, ChoonKee
Hong, Ling
Zhong, Lian
Chuang, Wei-Tsung
Hou, Jianhui
Li, Yongfang
Hsu, Chain-Shu
交大名義發表
應用化學系
National Chiao Tung University
Department of Applied Chemistry
關鍵字: non-fullerene acceptor;carbazole;fluorination effect;cross-linkable fullerene;cathode interlayer
公開日期: 28-八月-2019
摘要: In this article, a fluorinated heptacyclic dithienocyclopentacarbazole (DTC)-based non-fullerene acceptor (NFA), DTC(4Ph)-4FIC, is synthesized and blended with J71, PBDB-T, and PBDB-TF, featuring complementary absorption and well-matched energy levels. The DTC(4Ph)-4FIC neat film exhibits face-on preference, whereas the nonfluorinated counterpart, DTC(4Ph)-IC, exhibits edge-on preference; this unique feature owing to fluorination in DTC-based NFAs is observed for the first time. More importantly, DTC(4Ph)-4FIC exhibits improved power conversion efficiencies (PCEs) of 10.92 and 10.41% in J71- and PBDB-T-containing devices, while the devices that employed DTC(4Ph)-IC afford PCEs of 7.76 and 9.48%, respectively. Because PBDB-TF is known to exhibit lower energy levels than J71 and PBDB-T, the corresponding device affords a V-OC of 0.95 V, a J(SC) of 18.29 mA cm(-2), a FF of 75.70%, and a PCE of 13.15%, which is 20 and 26% higher than J71- and PBDB-T-containing devices. Furthermore, the inverted device containing the PBDB-TF:DTC(4Ph)-4FIC blend is fabricated using cross-linkable fullerene (C-PCBSD) as the cathode interlayer, affording a decent PCE of 13.36%, with a V-OC of 0.94 V, a J(SC) of 20.20 mA cm(-2), and a FF of 70.42%.
URI: http://dx.doi.org/10.1021/acsami.9b09044
http://hdl.handle.net/11536/152864
ISSN: 1944-8244
DOI: 10.1021/acsami.9b09044
期刊: ACS APPLIED MATERIALS & INTERFACES
Volume: 11
Issue: 34
起始頁: 31069
結束頁: 31077
顯示於類別:期刊論文