کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
77526 49283 2016 10 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله ISI
Correlation between morphology and device performance of pBTTT:PC71BM solar cells
ترجمه فارسی عنوان
بررسی ارتباط بین مورفولوژی و کارایی دستگاه pBTTT: سلول های خورشیدی PC71BM
کلمات کلیدی
00-01؛ سلول های خورشیدی فولرین؛: شرکت کریستال؛ پراکندگی نوترون؛ رسوبی فولرین؛ نوترکیبی اکسایتون
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی


• Magnetic contrast neutron reflectivity was used for accurate measurements.
• Small amount of fullerene is found in 1:1 samples correcting previous results.
• Morphology evolution mechanism was proposed for better understanding.

Phenyl-C71-butyric acid methyl ester (PC71BM) could intercalate between the side-chains of poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene (pBTTT) creating a stable co-crystal structure, so optimal solar cell performance was obtained at high PC71BM concentrations promoting phase separated electron conductive pathways. Neutron reflectivity, with the application of magnetic contrast variation, was used to investigate the concentration profile of PC71BM within the active layer. And this profile was found to be homogeneous through the film thickness. Small angle neutron scattering was utilized to find there is amorphous PC71BM even at 50 wt% of fullerene while previously it was believed that all fullerene was consumed to form co-crystals when its concentration is below 75 wt%. These fullerene molecules evolve into approximately 15 nm sized agglomerates to improve the electron transport when their concentration is above 75 wt%. Thermal annealing gives these agglomerates mobility to form micrometer sized crystals causing a decrease of device performance. These findings can therefore correlate the morphology, especially in terms of fullerene agglomerates, vertical concentration profile and percolating structure they formed, with the device performance and provide valuable guidance for optimal morphology design of polymer: fullerene solar cells.

Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solar Energy Materials and Solar Cells - Volume 155, October 2016, Pages 387–396
نویسندگان
, , , , , , , ,