Roll-coating fabrication of flexible large area small molecule solar cells with power conversion efficiency exceeding 1%

Autor: Hongzheng Chen, Frederik C. Krebs, Mikkel Jørgensen, Wenqing Liu, Eva Bundgaard, Thomas Rieks Andersen, Weifei Fu, Meirong Chen, Lei Fu, Pei Cheng, Xiaowei Zhan, Natalia Klaudia Zawacka, Shi-Yong Liu
Rok vydání: 2014
Předmět:
Zdroj: J. Mater. Chem. A. 2:19809-19814
ISSN: 2050-7496
2050-7488
DOI: 10.1039/c4ta04733h
Popis: All solution-processed flexible large area small molecule bulk heterojunction solar cells were fabricated via roll-coating technology. Our devices were produced from slot-die coating on a lab-scale mini roll-coater under ambient conditions without the use of spin-coating or vacuum evaporation methods. Four diketopyrrolopyrrole based small molecules (SMs 1–4) were utilized as electron donors with (6,6)-phenyl-C61-butyric acid methyl ester as an acceptor and their photovoltaic performances based on roll-coated devices were investigated. The best power conversion efficiency (PCE) of 1.01%, combined with an open circuit voltage of 0.73 V, a short-circuit current density of 3.13 mA cm−2 and a fill factor of 44% were obtained for the device with SM1, which was the first example reported for efficient roll-coating fabrication of flexible large area small molecule solar cells with PCE exceeding 1%. In addition, roll-coated devices based on SMs 2–4 also showed good performances with PCEs of 0.41%, 0.54%, and 0.31%, respectively. Our results prove that small molecules have the potential for use in industries for large scale production of efficient organic solar cells.
Databáze: OpenAIRE
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