화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.81, 309-316, January, 2020
DOI10.1016/j.jiec.2019.09.019  Export Citation
A symmetric benzoselenadiazole based D.A.D small molecule for solution processed bulk-heterojunction organic solar cells
Abdullah1, M. Shaheer Akhtar2, Eun-Bi Kim1, Lamiaa Fijahi1, Hyung-Shik Shin1, 3, †, and Sadia Ameen4, †
  • 1Energy Materials & Surface Science Laboratory, Solar Energy Research Center, School of Chemical Engineering, Chonbuk National University, Jeonju, 54896, Republic of Korea
  • 2New & Renewable Energy Material Development Center (NewREC), Chonbuk National University, Jeonbuk, Republic of Korea
  • 3Korea Basic Science Institute (KBSI), 169-148 Gwahak-ro, Yuseong-gu, Daejon, 34133, Republic of Korea
  • 4Advanced Materials and Devices Laboratory, Jeongeup Industry-Academic Cooperation Support Centre, Jeongeup Campus, Chonbuk National University, 56212, Republic of Korea
E-mail:,
Benzoselenadiazole as the central acceptor unit with terminal donor unit of n hexylbithiophene was chosen to design the symmetric donor-acceptor-donor (D-A-D) configuration based small organic chromophore, 4,7-bis(50-hexyl-[2,20-bithiophen]-5-yl)benzo[c][1,2,5]selenadiazole, RTh-BS -ThR, for the fabrication of solution-processed bulk-heterojunction organic solar cells (BHJ-OSCs). RTh BSe-ThR chromophore showed assuring solubility in common organic solvents and exhibited wider absorption in the visible region with an optical band gap (Eg opt) of ~1.87 eV. Benzoselenadiazole unit with two nhexylbithiophene units exhibited an excellent electrochemical behavior with the highest occupied molecular orbital (HOMO) of -5.38 eV and the lowest unoccupied molecular orbital (LUMO) of -3.51 eV. The fabricated BHJ-OSCs with RTh-BSe-ThR:PC61BM (1:3, w/w) blend thin film displayed a power conversion efficiency (PCE) of ~3.46% and a high value of short circuit current density (JSC) of ~11.20 mA/ cm2. The enhancement in the photovoltaic parameters might be attributed to the significant improvements in the interfacial area of bulk heterojunction which might enhance the light harvesting property and the shunt resistance of the blend thin films.
Keywords:Bulk heterojunction;Organic chromophore;Benzoselenadiazole;Organic solar cells;Photovoltaic properties
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