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- W2054863478 abstract "Abstract The photoconductive properties of a novel low‐bandgap conjugated polymer, poly[2,6‐(4,4‐bis‐(2‐ethylhexyl)‐4 H ‐cyclopenta[2,1‐ b ;3,4‐ b ′]dithiophene)‐ alt ‐4,7‐(2,1,3‐benzothiadiazole)], PCPDTBT, with an optical energy gap of E g ∼ 1.5 eV, have been studied. The results of photoluminescence and photoconductivity measurements indicate efficient electron transfer from PCPDTBT to PCBM ([6,6]‐phenyl‐C61 butyric acid methyl ester, a fullerene derivative), where PCPDTBT acts as the electron donor and PCBM as the electron acceptor. Electron‐transfer facilitates charge separation and results in prolonged carrier lifetime, as observed by fast ( t > 100 ps) transient photoconductivity measurements. The photoresponsivities of PCPDTBT and PCPDTBT:PCBM are comparable to those of poly(3‐hexylthiophene), P3HT, and P3HT:PCBM, respectively. Moreover, the spectral sensitivity of PCPDTBT:PCBM extends significantly deeper into the infrared, to 900 nm, than that of P3HT. The potential of PCPDTBT as a material for high‐efficiency polymer solar cells is discussed." @default.
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- W2054863478 date "2007-01-26" @default.
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- W2054863478 title "Photoconductivity of a Low-Bandgap Conjugated Polymer" @default.
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- W2054863478 doi "https://doi.org/10.1002/adfm.200600199" @default.
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