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首页> 外文期刊>Journal of Vacuum Science & Technology >Interfacial polymer ferroelectric dipole induced electric field effect on the photovoltaic performance of organic solar cells
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Interfacial polymer ferroelectric dipole induced electric field effect on the photovoltaic performance of organic solar cells

机译：界面聚合物铁电偶极感应电场对有机太阳能电池光伏性能的影响

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摘要

Effect of a dipolar electrical field on the photovoltaic properties of polymer solar cell devices in the bulk heterojunction structure based on 1:1 blend of donor-regioregular poly(3-hexylthiophene), P3HT, and acceptor-phenyl-C61-butyric acid methyl ester, PCBM, polymer semiconductor material is studied. With a thin layer of poled ferroelectric P(VDF + TrFE) copolymer film having oriented dipoles inserted at the interface between poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) and the P3HT:PCBM composite layer, significant improvement in the short-circuit photocurrent and open circuit voltage was observed consistent with the increase in the poling voltage. Remnant polarization charge due to dipoles produces localized electric field of 300–700 V · μm-1. The presence of the electric field helps increase the charge transfer exciton dissociation rates at the P3HT (donor)–PCBM (acceptor) interfaces, reduces the exciton recombination probability and increases the carrier extraction yield resulting in the enhancement in the photocurrent. Solar cell device in a structure having a poled P(VDF + TrFE) copolymer film sandwiched between the two P3HT:PCBM composite layers shows only a marginal improvement in the photovoltaic properties. This is mainly attributed to shielding of dipolar field from free charge carries and the inferior nanoscale morphology of the P3HT:PCBM composite layer.
机译：基于给体-区域规则的聚（3-己基噻吩），P3HT和受体-苯基-C61-丁酸甲酯的1：1混合物，偶极电场对本体异质结结构中聚合物太阳能电池器件光伏性能的影响，PCBM，高分子半导体材料的研究。在聚（3,4-乙撑二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）和P3HT：PCBM复合层之间的界面处插入一层定向偶极子的极化铁电P（VDF + TrFE）共聚物薄膜薄层观察到短路光电流和开路电压的改善与极化电压的增加一致。由于偶极子产生的残余极化电荷会产生300–700 V·μm -1 的局部电场。电场的存在有助于提高P3HT（施主）-PCBM（受体）界面处的电荷转移激子解离速率，降低激子复合的可能性，并增加载流子提取率，从而导致光电流的增加。具有极化的P（VDF + TrFE）共聚物膜夹在两个P3HT：PCBM复合层之间的结构中的太阳能电池器件仅显示出光伏性能的少量改善。这主要归因于屏蔽偶极场免受自由电荷携带，以及P3HT：PCBM复合层的纳米级形貌较差。

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  • 来源
    《Journal of Vacuum Science & Technology》 |2013年第4期|1-9|共9页
  • 作者

    Rastogi Alok C.;

  • 作者单位

    Electrical and Computer Engineering Department and Center for Autonomous Solar Power, Binghamton University, State University of New York, Binghamton, New York 13902|c|;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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