Star-shaped carbazole-based BODIPY derivatives with improved hole transportation and near-infrared absorption for small-molecule organic solar cells with high open-circuit voltages
Release Time:2019-03-09 Hits:
Indexed by: Journal Article
Date of Publication: 2015-01-01
Journal: RSC ADVANCES
Included Journals: Scopus、EI、SCIE
Volume: 5
Issue: 41
Page Number: 32283-32289
ISSN: 2046-2069
Abstract: A series of tunable absorbing star-shaped BODIPY derivatives containing a different number of carbazole units were designed and synthesized. With the extended conjugated skeleton, their absorption spectra become progressively bathochromic shifted from the red region to the near-infrared region. The compound TAC with four carbazole units exhibits a strong near-infrared absorption up to 850 nm with a high extinction coefficient over 135 000 M-1 cm(-1) and considerable intrinsic hole mobility of 4.82 x 10(-5) cm(2) V-1 s(-1) in SCLC devices. The near-infrared organic solar cells (OSCs) based on TAC exhibit a potential power conversion efficiency of 2.70% and a high open-circuit voltage of 0.85 V.
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