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제113회 대한화학회 학술발표회, 총회 및 기기전시회 안내 The novel conjugated alternating 2,2-bithiophene-3,3-dicarboximide containing polymers with different donor units: synthesis and photovoltaic application

2014년 2월 13일 16시 10분 54초
ORGN.P-779 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 16일 (수요일) 16:00~19:00
저자 및
백지연, 서홍석1,*
부산대학교 자연과학대학/화학과, Korea
1부산대학교 화학과, Korea
The novel accepter unit, 4H-dithieno[3,2-c:2’,3’-e]azepine-4,6(5H)-dione, was utilized and approved for the synthesis of the conjugated alternating polymers containing electron D-A pair for BHJ solar cells. The dithienoazepinedione, bithiophene imide (BTI) group, is an stylish electron deficient unit as it demonstrates strong electron-withdrawing disposition, and planar architecture. The polymer with benzodithiophene unit and linear dodecyl-BTI unit substituted with 2-octyldodecyl side chain was synthesized using Stille polymerization to produce P1. The novel polymer, P2, was synthesized by Suzuki polymerization of carbazole, thiophene and linear octyl-BTI unit to increase conjugation length. These polymers exhibited excellent good solubility and thermal stability. The spectra of P1 and P2 solid films show absorption bands with maximum peaks at P1:395, 538 P2:380, 491 nm and the absorption onsets by 652 and 634 nm, akin to band gaps of 1.90 eV, 1.96 eV, likewise. The best device with P1: PC71BM in ODCB with 2% DIO showed a VOC of 0.97 V, a JSC of 3.06 mA/cm2, and a FF of 0.49, which yielded PCE of 1.49%. and the P2:PC71PM (1:2) showed a VOC of 0.84 V, a JSC of 2.48 mA/cm2, and a FF of 0.36, which yielded PCE of 0.76%