Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 3, Issue 2, Pages 271-278Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am100920s
Keywords
organic photovoltaics; bulk heterojunction solar cells; oligoselenophenes; small molecule semiconductors; organic electronics; organic field-effect transistors
Funding
- NSF (STC-MDITR) [DMR 0120967, DMR 0747489]
- DOE Solar America Initiative
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0747489] Funding Source: National Science Foundation
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Solution-processable oligoselenophenes functionalized with diketopyrrolopyrfole cores have! been synthesized for use as the donor material in bulk heterojunction solar cells. The optical absorption of these materials extends to the edge of the visible spectrum. Power conversion efficiencies of 1.53 +/- 0.04% for DPPS and 0.84 +/- 0.04% for DPPDS were obtained under simulated 100 mW/cm(2) AM 1.5G irradiation for devices when PC61BM was used as an acceptor. DPPS showed hole mobilities of 4 x 10(-5) cm(2)/(V s) and a peak erternal quantum efficiency (EQE) of 25%, while DPPDS showed hole mobilities of 2 x 10(-5) cm(2)/(V s) and a peak EQE of 19%. To the best of our knowledge, these are the first oligoselenophenes that have been reported in molecular bulk heterojunction solar cells and this study could serve as a springboard for the design and optimization of high-performance selenophene-containing photovoltaics.
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