کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5213067 | 1383144 | 2016 | 8 صفحه PDF | دانلود رایگان |
Two novel D(A-Ar)2 type small molecules (SMs) of 3T(DPP-BTI)2 and 4T(DPP-BTI)2 were synthesized and characterized, which contain diketopyrrolopyrrole (DPP) arms, 6-dodecyl-6H-benzo[4,5]thieno[2,3-b]indole (BTI) terminals, and oligomerthiophene donor unit (3T=trithiophene, 4T=tetrathiophene). The relation-ship between structure and property was investigated. Compared with their corresponding parent A-D-A type SMs, both D(A-Ar)2 type SMs exhibited a significantly increasing circuit current density (Jsc) by 1.39â¼1.59 times and hole mobility (μh) by one order of magnitude, as well as a comparable power conversion efficiency (PCE) in their OPV and hole-only devices. The better photovoltaic properties with PCE of 3.02% and Jsc of 10.41 mA cmâ2 were obtained in the 3T(DPP-BTI)2 based OPV cells. It indicates that appending the BTI terminal unit into A-D-A-type SMs is beneficial to increasing the Jsc and μh values of its resulting D(A-Ar)2 type SMs in their corresponding devices.
205Two novel D(A-Ar)2 type small molecules (SMs) of 3T(DPP-BTI)2 and 4T(DPP-BTI)2 with oligothiophene, diketopyrrolopyrrole, benzo[4,5]thieno[2,3-b]indole units were synthesized. Compared to their parent A-D-A type SMs of 3TDPP2 and 4TDPP2, both D(A-Ar)2 type SMs exhibited a significantly increasing Jsc by 1.5-1.7 times and hole mobility (Mh) by one order of magnitude, as well as a comparable PCE in their corresponding OPV and hole-only devices.
Journal: Tetrahedron - Volume 72, Issue 47, 24 November 2016, Pages 7430-7437