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Synthesis and photovoltaic property of copolymers with phenanthrothiadiazole moiety
Song, Suhee,Park, Seijung,Kwon, Sooncheol,Lee, Byoung Hoon,Shim, Joo Young,Lee, Jongjin,Park, Sung Heum,Jin, Youngeup,Kim, Il,Lee, Kwanghee,Suh, Hongsuk Elsevier 2012 Solar energy materials and solar cells Vol.105 No.-
Fluorine이 도입된 Quinoxaline과 Fluorene 골격을 가진 고분자의 합성 및 특성분석
송수희 ( Suhee Song ),최효일 ( Hyo Il Cho ),신인수 ( In Soo Shin ),박성수 ( Seong Soo Park ),이근대 ( Gun Dae Lee ),박성흠 ( Sung Heum Park ),진영읍 ( Youngeup Jin ) 한국공업화학회 2016 공업화학 Vol.27 No.5
새로운 전자 받개인 6,7-difluoro-2,3-dihexylquinoxaline을 이용하여 유기 태양 전지형 고분자를 개발하였다. Fluorene과 6,7-difluoro-2,3-dihexylquinoxaline으로 Suzuki polymerization방법을 이용하여 낮은 HOMO 에너지를 가지는 PFDTQxF 고분자를 합성하였다. 필름상태의 PFDTQxF은 368과 493 nm에서 두 개의 흡광도를 보였다. PFDTQxF의 HOMO와 LUMO 에너지는 각각 -5.55와 -3.91 eV을 나타내었다. PFDTQxF의 태양전지 소자는 0.47 V의 VOC와 4.48 mA/cm²의 JSC와 0.32의 FF를 가지고 있어 0.78%의 에너지 효율을 나타내었다. New electron deficient moiety, 6,7-difluoro-2,3-dihexylquinoxaline, was developed for the push-pull type copolymer for organic photovoltaics (OPVs). The PFDTQxF with lower HOMO energy level was synthesized using fluorene and 6,7-difluoro- 2,3-dihexylquinoxaline by Suzuki polymerization. The PFDTQxF thin film shows two absorption peaks at 368 and 493 nm. The HOMO and LUMO energy levels of PFDTQxF are calculated -5.55 and -3.91 eV, respectively. The device comprising PFDTQxF showed a VOC value of 0.47 V, a JSC value of 4.48 mA/cm², and a FF of 0.32, which yielded PCE of 0.78%, under the illumination of AM 1.5.
Song, Suhee,Choi, Hyo Il,Shin, In Soo,Hyun, Myung Ho,Suh, Hongsuk,Park, Seong Soo,Park, Sung Heum,Jin, Youngeup Korean Chemical Society 2014 Bulletin of the Korean Chemical Society Vol.35 No.10
We report synthesis and photovoltaic properties of two new conjugated copolymers, PCPDTQxF and PDTSQxF, with 6,7-difluoro-2,3-dihexylquinoxaline unit prepared by Stille coupling reaction. The advantage of 6,7-difluoro-2,3-dihexylquinoxaline based copolymer are high PCEs due to lower HOMO energy level, long wavelength absorption and high hole mobility. The solid films of PCPDTQxF and PDTSQxF showed absorption bands with maximum peaks at about 623 and 493 nm and the absorption onsets at 711 and 635 nm, corresponding to band gaps of 1.74 and 1.95 eV, respectively. The oxidation onsets of the PCPDTQxF and PDTSQxF polymers were estimated to be 0.68 and 0.95 V, which correspond to HOMO energy levels of -5.48 and -5.75 eV, respectively. The PDTSQxF has lower HOMO energy level as compared to PCPDTQxF to lead higher $V_{OC}$ value. The device comprising PCPDTQxF:PCBM (1:2) dissolved to a concentration of 1 wt % in ODCB showed $V_{OC}$ value of 0.62 V, $J_{SC}$ value of $1.14mA/cm^2$, and FF of 0.35, which yielded PCE of 0.25%.