【摘 要】
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The incorporation of an additional component into the bulk-heterojunction light-harvesting layer of polymer solar cells has been considered as an effective strategy to enhance photovoltaic performance.Here we demonstrated that the photovoltaic parameters
【机 构】
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Institute of Polymer Optoelectronic Materials and Devices,State Key Laboratory of Luminescent Materi
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The incorporation of an additional component into the bulk-heterojunction light-harvesting layer of polymer solar cells has been considered as an effective strategy to enhance photovoltaic performance.Here we demonstrated that the photovoltaic parameters of all-polymer solar cells could be enhanced upon replacing a certain ratio of electron-donating polymer PTzBI-oF with a widely used wide-bandgap polymer donor PM6.The photoluminescent characterizations confirmed the F(o)rster resonance energy transfer from incorporated PM6 to PTzBI-oF.Moreover,the combination of Fourier-transform photocurrent spectroscopy and electroluminescence external quantum efficiencies measurements demonstrated reduced non-radiative recombination energy loss upon the incorporation of PM6,resulting in a slightly enhanced open-circuit voltage of 0.88 V of the ternary cell regarding the binary PTzBI-oF:PFA1 device.The optimized ternary blend devices comprising of PTzBI-oF:PM6:PFA1 presented an impressively high power conversion efficiency of 16.3％,and the efficiency remains 15％ on a device with an enlarged effective area of 1 cm2,demonstrating the great potential of these all-PSCs for potential applications.
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