کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
175607 458915 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Soluble acetylenic molecular glasses based on dithienyldiketopyrrolopyrrole for organic solar cells
ترجمه فارسی عنوان
عینک مولکولی استیلنیک قابل حل بر اساس دی اتینیلدیکتوپییررولپپیرول برای سلول های خورشیدی آلی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• Soluble acetylenic molecular glasses based on DT-DPP for OSCs have been reported.
• The optical absorption of the dye films was little affected by thermal annealing below Tg.
• The difluorenyl(2-naphthyl)amine endgroup contributes to increasing μhole and PCE.

We present the synthesis and photovoltaic response of soluble glass-forming molecules containing a dithienyldiketopyrrolopyrrole core and difluorenylarylamine endgroups, linked through an acetylene bond. Introducing the 2,6-naphthylene moiety vs. 1,4-phenylene leads to an increased glass transition temperature (Tg) and hole mobility. Thus, Tg = 107.7 °C, μh = 7.95 × 10−5 cm2 V−1 s−1 for the 1,4- phenylene compound, while Tg = 119.4 °C, μh = 9.17 × 10−5 cm2 V−1 s−1 for the 2,6-naphthylene compound. Thermal annealing the as-cast films of both compounds below Tg resulted in little change in optical absorption. The preliminary characterization of the bulk hetero-junction solar cells showed that the 2,6-naphthylene compound generally provides a higher power conversion efficiency than the 1,4-phenylene compound, due probably to its enhanced hole transport. The photoluminescence experiments show a weak exciplex emission around 880 nm for the blends containing the new dyes and PC61BM. The present work may be useful for further efforts toward high-performance cost-effective acetylenic organic semiconductors for organic solar cells with thermally stable morphology.

Introducing the 2,6-naphthyl moiety vs. 1,4-phenyl increases Tg and hole mobility, thus contributing to enhancing the power conversion efficiency.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Dyes and Pigments - Volume 126, March 2016, Pages 96–103
نویسندگان
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