Wide Band-Gap 3,4-Difluorothiophene-Based Polymer with 7% Solar Cell Efficiency: An Alternative to P3HT | Zendy

Jannic Wolf | Zendy; Federico Cruciani | Zendy; Abdulrahman El Labban | Zendy; Pierre M. Beaujuge | Zendy

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Wide Band-Gap 3,4-Difluorothiophene-Based Polymer with 7% Solar Cell Efficiency: An Alternative to P3HT

Author(s) -

Jannic Wolf,

Federico Cruciani,

Abdulrahman El Labban,

Pierre M. Beaujuge

Publication year - 2015

Publication title -

chemistry of materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.741

H-Index - 375

eISSN - 1520-5002

pISSN - 0897-4756

DOI - 10.1021/acs.chemmater.5b01520

Subject(s) - solar cell , band gap , materials science , polymer , polymer solar cell , optoelectronics , chemical engineering , nanotechnology , composite material , engineering

We report on a wide band-gap polymer donor composed of benzo[1,2-b:4,5-b']dithiophene (BDT) and 3,4-difluorothiophene ([2F]T) units (Eopt ~2.1 eV), and show that the fluorinated analog PBDT[2F]T performs significantly better than its non-fluorinated counterpart PBDT[2H]T in BHJ solar cells with PC71BM. While control P3HT- and PBDT[2H]T-based devices yield PCEs of ca. 4% and 3% (Max.) respectively, PBDT[2F]T-based devices reach PCEs of ca. 7%, combining a large Voc of ca. 0.9 V and short-circuit current values (ca. 10.7 mA/cm2) comparable to those of the best P3HT-based control devices

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