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 

机构地区：[1]Advanced Materials and Devices Laboratory,Department of Bio-Convergence Science,Jeongeup Campus,Jeonbuk National University,56212,Republic of Korea [2]New&Renewable Energy Material Development Center(NewREC),Jeonbuk National University,Republic of Korea [3]Energy Materials&Surface Science Laboratory,Solar Energy Research Center,School of Chemical Engineering,Jeonbuk National University,54896,Republic of Korea [4]Korea Basic Science Institute(KBSI),169-148 Gwahak-ro,Yuseong-gu,Daejon,34133,Republic of Korea

出　　处：《Journal of Materiomics》2021年第5期1112-1121,共10页无机材料学学报（英文）

基　　金：This work was also supported by the National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIT)No-2019R1F1063999;E.-B.Kim acknowledges the research grant from NRF Korea(Project No.:2020R1A6A3A13070611).

摘　　要：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)as acceptor core and end-capped with triphenylamine(TPA)donor units as donor materials in solar cells.Superlatively,the attachment of TPA donor moiety in BSe acceptor unit enlarged the conjugated system by extending the p-bonding which effectively tuned the optical and electrochemical properties of Se-2TPA.The bulk heterojunction organic solar cell(BHJ-OSCs)with configuration of ITO/cp-TiO_(2)/Se-2TPA:PC61BM/Au showed power conversion efficiency(PCE)of~4.12% with short circuit current(Jsc)value of~11.28 mA/cm^(2),open circuit voltage(Voc)of~0.775 V and fill factor(FF)of~0.48.PCE significantly increased from~4.12% to~5.29% when 1,8-diiodooctane(DIO)was added as an additive in Se-2TPA:PC61BM blend which associated with less phase separation and improved the charge extraction.The fabricated BHJ-OSCs processed with 3%DIO,ITO/cp-TiO_(2)/Se-2TPA:PC61BM/Au configuration displayed a long-term stability under air condition at an ambient temperature by maintaining~80% PCE for the duration of 30 days.The advantages of easy synthesis,low cost and promising cell performance supported Se-2TPA as successful organic semiconductor for BHJ-OSCs.

关 键 词：Benzoselenadiazole Thin film Organic semiconductor STABILITY Organic solar cells 

分 类 号：TM914.4[电气工程—电力电子与电力传动]