title: The Fabrication of Ordered Bulk Heterojunction Solar Cell by Nanoimprinting Lithography Method Using Patterned Silk Fibroin Mold at Room Temperature.
abstract: The performance of organic solar cell is greatly determined by the nanoscale heterojunction morphology, and finding a practical method to achieve advantageous nanostructure remains a challenge. We demonstrate here that ordered bulk heterojunction (OBHJ) solar cell can be fabricated assisted by a simple, cost-effective nanoimprinting lithography method using patterned silk fibroin film mold at room temperature. The P3HT nanogratings were achieved by nanoimprinting lithography (NIL) process, and phenyl-C61-butyric acid methyl ester (PCBM) was spin-coated on the top of P3HT nanogratings. The conducting capacity of P3HT nanograting film has little difference compared with the unimprinted film in the vertical direction, due to the same edge-on chain alignment. However, it can be found that the fabrication of OBHJ nanostructure using room temperature NIL technique with patterned silk fibroin mold is able to promote optical absorption, interfacial area, and bicontinuous pathway. Therefore, the ordered heterojunction morphology plays an important part in improving device performance due to efficient exciton diffusion, dissociation, and reducing charge recombination rate.
authors.affiliation: College of Chemistry and Materials Science, Huaibei Normal University, Huaibei, 235000, China. dinggz@chnu.edu.cn.|Collaborative Innovation Center of Advanced Functional Composites of Anhui Province, Huaibei, 235000, China. dinggz@chnu.edu.cn.
authors.forename: Guangzhu
authors.initials: G
authors.lastname: Ding
authors.affiliation: College of Chemistry and Materials Science, Huaibei Normal University, Huaibei, 235000, China.|Collaborative Innovation Center of Advanced Functional Composites of Anhui Province, Huaibei, 235000, China.
authors.forename: Qianqian
authors.initials: Q
authors.lastname: Jin
authors.affiliation: College of Chemistry and Materials Science, Huaibei Normal University, Huaibei, 235000, China.|Collaborative Innovation Center of Advanced Functional Composites of Anhui Province, Huaibei, 235000, China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Chen
authors.affiliation: Center for Soft Condensed Matter Physics and Interdisciplinary Research, Soochow University, Suzhou, 215123, China.
authors.forename: Zhijun
authors.initials: Z
authors.lastname: Hu
authors.affiliation: College of Chemistry and Materials Science, Huaibei Normal University, Huaibei, 235000, China. jpliu@chnu.edu.cn.
authors.forename: Jieping
authors.initials: J
authors.lastname: Liu
keywords: Nanoimprint lithography; Nanopattern; Ordered bulk heterojunction; Silk fibroin film