Browsing by Author "Yu, Kai-Chieh"

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Large-area organic solar cells by accelerated blade coating
(2015-07-01)
Tsai, Pei-Ting
;
Yu, Kai-Chieh
;
Chang, Chia-Ju
;
Horng, Sheng-Fu
;
Meng, Hsin-Fei
Large-area photovoltaic devices have been fabricated using the blade coating technique. In this study, the use of accelerated blade motion in this technique significantly improved the thickness uniformity of blade-coated layers of polymer solar cells on an A4 glass substrate. Two types of active layers, P3HT: PC61BM and POD2T-DTBT: PC71BM, were studied. For the P3HT: PC61BM film, a thickness of 221 +/- 14 nm was realised in a 12 x 15 cm(2) active region with a coating blade acceleration of 8 mm/s(2). For the POD2T-DTBT: PC71BM film, a thickness of 98 +/- 6 nm was realised with a coating blade acceleration of 10 mm/s(2). Ten cells, each measuring 0.9 cm x 12 cm and monolithically fabricated, were connected in series, yielding a total active area of 108 cm(2). The power conversion efficiency of the resulting 10-cell module was 2.66% and 3.64% for P3HT: PC61BM and POD2T-DTBT: PC71BM, respectively. The blade coating technique involving the accelerated blade motion is therefore useful for fabricating low-cost large-area organic solar cells, and it may be a promising alternative for the commercialisation of organic solar cells. (C) 2015 Elsevier B.V. All rights reserved.