Abstract
Modified [6,6]-phenyl-C70-butyric acid methyl ester (CN-PC70BM) is employed as an electron acceptor along with poly[4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b; 4,5-b']dithiophene-2,6-diyl-alt-(4-(2-ethylhexyl)-3-fluorothieno[3,4-b]thiophene-)-2-carboxylate-2-6-diyl)] (PTB7-Th) polymer as donor for solution-processed organic solar cells. Inverted device architecture is adopted to fabricate the photovoltaic devices. Using chloronaphthalene as an additive, a high power conversion efficiency (PCE) of 8.2% is achieved with an excellent open circuit voltage (Voc) of 0.9 V, short-circuit current density (Jsc) of 13.5 mA cm−2 and fill factor of 0.68 as compared to PCE of 5.4% from the reference solar cell using PC70BM.
Original language | British English |
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Pages (from-to) | 262-267 |
Number of pages | 6 |
Journal | Organic Electronics |
Volume | 43 |
DOIs | |
State | Published - 1 Apr 2017 |
Keywords
- Additive
- High open circuit voltage
- High power conversion efficiency
- Modified fullerene acceptor
- Organic solar cells
- PTB7-Th polymer donor