Abstract
The price of energy to separate tightly bound electron-hole pair (or charge-transfer state) and extract freely movable charges from low-mobility materials represents fundamental losses for many low-cost photovoltaic devices. In bulk heterojunction (BHJ) polymer solar cells (PSCs), approximately 50% of the total efficiency lost among all energy loss pathways is due to the photogenerated charge carrier recombination within PSCs and low charge carrier mobility of disordered organic materials. To address these issues, we introduce magnetic nanoparticles (MNPs) and orientate these MNPS within BHJ composite by an external magnetostatic field. Over 50% enhanced efficiency was observed from BHJ PSCs incorporated with MNPs and an external magnetostatic field alignment when compared to the control BHJ PSCs. The optimization of BHJ thin film morphology, suppression of charge carrier recombination, and enhancement in charge carrier collection result in a greatly increased short-circuit current density and fill factor, as a result, enhanced power conversion efficiency.
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Citations
Jan 25, 2017·ACS Applied Materials & Interfaces·Kai WangXiong Gong
Jun 10, 2017·Physical Chemistry Chemical Physics : PCCP·Peng SongMengtao Sun
Apr 19, 2016·Chemical Society Reviews·Kai WangXiong Gong
Feb 9, 2016·Chemical Record : an Official Publication of the Chemical Society of Japan ... [et Al.]·Peng SongMengtao Sun
Apr 27, 2019·Nanoscale·Kunyu LiangAyse Turak
Oct 17, 2019·Physical Chemistry Chemical Physics : PCCP·Dorota LachowiczAndrzej Bernasik
Aug 31, 2017·ACS Applied Materials & Interfaces·Qian WangRenqiang Yang
Sep 12, 2020·ACS Applied Materials & Interfaces·Wenzhan XuXiong Gong