کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6598254 | 1423878 | 2018 | 33 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
End-group tuning of DTBDT-based small molecules for organic photovoltaics
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: End-group tuning of DTBDT-based small molecules for organic photovoltaics End-group tuning of DTBDT-based small molecules for organic photovoltaics](/preview/png/6598254.png)
چکیده انگلیسی
We report three DTBDT-based small molecules with various end groups and the effects of end-group tuning on their photovoltaic properties. We designed and synthesized DTBDT-Rho, DTBDT-EC, and DTBDT-CN, which have 3-ethylrhodanine, dicyanovinyl, and ethyl cyanoacetate, respectively, as end groups. DTBDT-EC and DTBDT-CN have much deeper LUMO and HOMO energy levels than DTBDT-Rho due to the stronger electron withdrawal of their end groups. As expected, the three DTBDT-based small molecules exhibit disparate bulk heterojunction blend morphologies and photovoltaic properties. DTBDT-Rho exhibits superior miscibility with PC71BM in blend films as well as crystalline structure within DTBDT-Rho domains, which result in solar cell devices with outstanding photovoltaic performances, namely PCEs above 7%. In contrast, DTBDT-CN gives rise to devices with poor performance of PCEs near 2%. It exhibits excessive molecular aggregation with less favorable molecular packing. Our study of end group tuning and morphological analysis provides valuable guidelines for the design of new small molecules and insight into their photovoltaic performances.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Dyes and Pigments - Volume 157, October 2018, Pages 93-100
Journal: Dyes and Pigments - Volume 157, October 2018, Pages 93-100
نویسندگان
Hwan-Il Je, Jisu Hong, Hyeok-jin Kwon, Na Yeong Kim, Chan Eon Park, Soon-Ki Kwon, Tae Kyu An, Yun-Hi Kim,