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首页> 外文期刊>Journal of Applied Polymer Science >Pyrrole-based narrow-band-gap copolymers for red light-emitting diodes and bulk heterojunction photovoltaic cells
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Pyrrole-based narrow-band-gap copolymers for red light-emitting diodes and bulk heterojunction photovoltaic cells

机译：用于红色发光二极管和本体异质结光伏电池的吡咯基窄带隙共聚物

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摘要

A series of narrow-band-gap conjugated copolymers (PFO-DPT) derived from pyrrole, benzothiadiazole, and 9,9-dioctylfluorene (DOF) is prepared by the palladium-catalyzed Suzuki coupling reaction with the molar feed ratio of 4,7-bis(N-methylpyrrol-2-yl)-2,1,3-benzothiadiazole (DPT) around 1, 5, 15, 30, and 50%. The obtained polymers are readily soluble in common organic solvents. The solutions and the thin solid films of the copolymers absorb light from 300 nm to 600 nm with two absorbance peaks at around 380 nm and 505 nm. The PL emission consists mainly of DPT unit emission at around 624-686 nm depending on the DPT content in solid film. The EL emission peaks are red-shifted from 630 nm for PFO-DPT1 to 660 nm for PFO-DPT50. Bulk heterojunction photovoltaic cells fabricated from composite films of copolymer and [6,6]-phenyl C_(61) butyric acid methyl ester (PCBM) as electron donor and electron acceptor, respectively, in device configuration: ITO/PEDOT: PSS/PFO-DPT: PCBM/Ba/Al shows power conversion efficiencies 0.15% with open-circuit voltage (V_(oc)) of 0.60 V and shortcircuit current density (J_(sc)) of 0.73 mA/cm ~2 under AM1.5 solar simulator (100 mW/cm~2).
机译：通过钯催化的铃木偶联反应，以摩尔进料比为4,7-双（N-甲基吡咯-2-基）-2,1,3-苯并噻二唑（DPT）约为1,5％，15、30和50％。所获得的聚合物容易溶于常见的有机溶剂。共聚物的溶液和固体薄膜吸收300 nm至600 nm的光，并在380 nm和505 nm处出现两个吸收峰。 PL发射主要由大约624-686 nm的DPT单位发射组成，具体取决于固体膜中的DPT含量。 EL发射峰从PFO-DPT1的630 nm红移到PFO-DPT50的660 nm。分别由共聚物和[6,6]-苯基C_（61）丁酸甲酯（PCBM）作为电子供体和电子受体的复合膜制成的块状异质结光伏电池，其器件配置为：ITO / PEDOT：PSS / PFO- DPT：在AM1.5太阳模拟器下，PCBM / Ba / Al在0.60 V的开路电压（V_（oc））和0.73 mA / cm〜2的短路电流密度（J_（sc））的情况下显示出0.15％的功率转换效率（100 mW / cm〜2）。

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