Justifying benzoselenadiazole acceptor core as organic semiconductor for stable bulk-heterojunction organic solar cells at ambient temperature
作者： Abdullah , M Shaheer Akhtar , Eun-Bi Kim , Hyung-Shik Shin , Sadia Ameen
DOI: 10.1016/J.JMAT.2021.01.010
关键词:
摘要: Abstract This work describes the utilization of D-A-D type organic semiconductor, 4,4’-(benzo[c] [1,2,5]selenadiazole-4,7-diyl)bis(N,N-diphenylaniline), denoted as Se-2TPA, containing benzoselenadiazole (BSe) acceptor core and end-capped with triphenylamine (TPA) donor units materials in solar cells. Superlatively, attachment TPA moiety BSe unit enlarged conjugated system by extending π-bonding which effectively tuned optical electrochemical properties Se-2TPA. The bulk heterojunction cell (BHJ-OSCs) configuration ITO/cp-TiO2/Se-2TPA:PC61BM/Au showed power conversion efficiency (PCE) ∼4.12% short circuit current (Jsc) value ∼11.28 mA/cm2, open voltage (Voc) ∼0.775 V fill factor (FF) ∼0.48. PCE significantly increased from to ∼5.29% when 1,8-diiodooctane (DIO) was added an additive Se-2TPA:PC61BM blend associated less phase separation improved charge extraction. fabricated BHJ-OSCs processed 3% DIO, displayed a long-term stability under air condition at ambient temperature maintaining ∼80% for duration 30 days. advantages easy synthesis, low cost promising performance supported Se-2TPA successful semiconductor BHJ-OSCs.
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