氟代苯并[d][1,2,3]三氮唑基共聚物的合成与光伏性能研究

Study on Synthesis and Photovoltaic Properties of Fluorobenzo[d][1,2,3]triazole-based Copolymer

以引达省并二噻吩(IDT)作为电子给体单元(D),噻吩并[3,2-b]噻吩(TT)作为π-桥基团,氟代苯并[d][1,2,3]三氮唑(FFTAZ)作为电子受体单元(A),设计合成了一种D-π-A型宽带系交替共聚物:PIDT-DTTFFTAZ,并对其吸收特性、电化学特性、能级和光伏性能进行了测试及研究。研究显示,PIDT-DTTFFTAZ的光学带隙(E_g)为2.02 e V,以PIDT-DTTFFTAZ作为给体和[6,6]苯基-C_(61)-丁酸甲酯(PC61BM)作为受体(PIDT-DTTFFTAZ∶PC_(61)BM=1∶1.5)制备了聚合物太阳能电池,测得其开路电压(VOC)、短路电流密度(JSC)和填充因子(FF)分别为0.86 V、4.91 mA·cm^(-2)和38.01%,能量转换效率(PCE)达到1.61%。

Using indacenodithiophene(IDT)as donor(D)moiety,thieno[3,2-b]thiophene(TT)asπ-bridge,and fluorobenzo[d][1,2,3]triazole(FFTAZ)as acceptor(A)unit,one D-π-A type conjugated polymer PIDT-DTTFFTAZ was designed and prepared.And the absorption,electrochemical property,energy level and photovoltaic property were studied.PIDT-DTTFFTAZ exhibited the optical band gap(E g)of approximately 2.02 eV.The polymer solar cells(PSCs)with an inverted device structure based on PIDT-DTTFFTAZ as donor and[6,6]phenyl-C 61 butyric acid methyl ester(PC 61 BM)as acceptor were assembled and the photovoltaic properties were also investigated.The device(PIDT-DTTFFTAZ:PC 61 BM=1:1.5)exhibited the power conversion efficiency(PCE)of 1.61%,with an open-circuit voltage(V OC)of 0.86 V,a short-circuit current density(J SC)of 4.91 mA·cm-2,a fill factor(FF)of 38.01%.