The power conversion efficiency （PCE） of poly（3-hexylthiophene） （P3HT） and [6,6]-phenyl C61-butyric acid methyl ester （P061BM） based organic solar cells （OSCs） is significantly improved by using benzyl aceta...The power conversion efficiency （PCE） of poly（3-hexylthiophene） （P3HT） and [6,6]-phenyl C61-butyric acid methyl ester （P061BM） based organic solar cells （OSCs） is significantly improved by using benzyl acetate （BA）, an organic compound without any halogen or sulphur atom, as a processing additive to control the blend morphology. The solar cells show PCE of 3.85% with a fill factor （FF） of 65.22%, which are higher than those of the common thermal annealing device （PCE 3.30%, FF 60.83%）. The overall increased PCE depends upon the enhanced crystallinity of P3HT and good carriers transport, with a high balanced charge carrier mobility.展开更多
Effects of thermal annealing on the optical, electrical and structural properties of 3 vol% 1,8-diiodoctane added P3HT：PC61BM active layers are investigated, concerning the performance of the bulk heterojunction poly...Effects of thermal annealing on the optical, electrical and structural properties of 3 vol% 1,8-diiodoctane added P3HT：PC61BM active layers are investigated, concerning the performance of the bulk heterojunction polymer so- lar cells by changing the heat temperature. The structure information of the active layer is analyzed by using the grazing incidence wide angle scattering diffraction combined with the optical microscope, light absorption, pho- toluminescence and the external quantum efficiency spectra. The relationship between the detail of morphology and the optical, electrical properties is investigated.展开更多
We assembled a ternary blend bulk heterojunction polymer solar cell(PSCs) containing P3HT(donor) and PC61BM(acceptor) incorporated with a small molecule oligomer, dihexyl-quaterthiophene(DH4T) as a third component. By...We assembled a ternary blend bulk heterojunction polymer solar cell(PSCs) containing P3HT(donor) and PC61BM(acceptor) incorporated with a small molecule oligomer, dihexyl-quaterthiophene(DH4T) as a third component. By optimizing the contents of DH4 T, we increased the power conversion efficiency of ternary P3HT:DH4T:PC61BM PSCs to 4.17% from 3.44% of binary P3HT:PC61BM PSCs under AM 1.5 G of 100 m W/cm2 intensity. The major improvement is from the increase of the short circuit current and fill factor that is due to the increased light absorption at short wavelength, the balanced charge carrier transportation and the enhanced hole evacuation by a DH4T-enriched layer at the anode interface. In this work, we demonstrated that the efficiency of the PSCs can be enhanced by using low-bandgap conjugated polymer and its oligomer as donors and fullerene derivatives as acceptors.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 61405209,61107090,21172187,51273168,20102139 and 51173199the National Basic Research Program of China under Grant Nos 2014CB643501 and 2010DFA52310+3 种基金the Shandong Provincial Natural Science Foundation under Grant No ZR2011BZ007the Key Project of Hunan Province Education Department under Grant No 13A102the Innovation Group and Xiangtan Joint Project of Hunan Natural Science Foundation under Grant Nos 12JJ7002 and 12JJ8001the Scientific Research Fund of Hunan Provincial Education Department under Grant Nos 11CY023 and 12B123
文摘The power conversion efficiency （PCE） of poly（3-hexylthiophene） （P3HT） and [6,6]-phenyl C61-butyric acid methyl ester （P061BM） based organic solar cells （OSCs） is significantly improved by using benzyl acetate （BA）, an organic compound without any halogen or sulphur atom, as a processing additive to control the blend morphology. The solar cells show PCE of 3.85% with a fill factor （FF） of 65.22%, which are higher than those of the common thermal annealing device （PCE 3.30%, FF 60.83%）. The overall increased PCE depends upon the enhanced crystallinity of P3HT and good carriers transport, with a high balanced charge carrier mobility.
基金Supported by the National Natural Science Foundation of China under Grant Nos 51272022 and 11474018the Research Fund for the Doctoral Program of Higher Education of China under Grant No 20120009130005the Fundamental Research Funds for the Central Universities under Grant No 2012JBZ001
文摘Effects of thermal annealing on the optical, electrical and structural properties of 3 vol% 1,8-diiodoctane added P3HT：PC61BM active layers are investigated, concerning the performance of the bulk heterojunction polymer so- lar cells by changing the heat temperature. The structure information of the active layer is analyzed by using the grazing incidence wide angle scattering diffraction combined with the optical microscope, light absorption, pho- toluminescence and the external quantum efficiency spectra. The relationship between the detail of morphology and the optical, electrical properties is investigated.
基金financially supported by the National Natural Science Foundation of China(21374120)support by 100 Talents Program of the Chinese Academy of Sciences
文摘We assembled a ternary blend bulk heterojunction polymer solar cell(PSCs) containing P3HT(donor) and PC61BM(acceptor) incorporated with a small molecule oligomer, dihexyl-quaterthiophene(DH4T) as a third component. By optimizing the contents of DH4 T, we increased the power conversion efficiency of ternary P3HT:DH4T:PC61BM PSCs to 4.17% from 3.44% of binary P3HT:PC61BM PSCs under AM 1.5 G of 100 m W/cm2 intensity. The major improvement is from the increase of the short circuit current and fill factor that is due to the increased light absorption at short wavelength, the balanced charge carrier transportation and the enhanced hole evacuation by a DH4T-enriched layer at the anode interface. In this work, we demonstrated that the efficiency of the PSCs can be enhanced by using low-bandgap conjugated polymer and its oligomer as donors and fullerene derivatives as acceptors.
