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Enhanced performance of PTB7-Th:PCBM based active layers in ternary organic solar cells

机译:增强PTB7-TN的性能:三元有机太阳能电池中基于PTB7-TH的PCBM基于活动层

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摘要

The present study aims at understanding the role of incorporating Cu2S nanocrystals (NCs) as a third component in ternary organic solar cells. Ternary photoactive blends consisting of conjugated polymer poly[4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b;4,5-b]dithiophene-2,6-diyl-alt-(4-(2-ethylhexyl)-3-fluorothieno[3,4-b]thiophene-)-(2-carboxylate-2-6-diyl)] (PTB7-Th), fullerene derivative phenyl-C-71-butyric acid methyl ester (PCBM) and different wt% of Cu2S NCs were formulated and were employed to fabricate ternary OSCs having a device architecture of ITO/ZnO/PTB7-Th:Cu2S NCs:PCBM/MoO3/Ag. It has been observed that with the addition of 3 wt% of Cu2S NCs, an improved power conversion efficiency (PCE) of 8.20% is obtained against the PCE of 6.96% for reference devices. EIS measurements and AFM studies suggests that the presence of Cu2S NCs facilitates formation of cascading energy levels, provides smoother surfaces and helps in suppressing trap-assisted recombination.
机译:本研究旨在了解将Cu 2 S纳米晶体(NCS)作为三元有机太阳能电池中的第三组分的作用。 由缀合的聚合物聚合物组成的三元光活性混合物[4,8-双(5-(2-乙基己基)噻吩-2-基)苯并[1,2-B; 4,5-B]二噻吩-2,6-二基 - Alt-(4-(2-乙基己基)-3-氟硫噻吩[3,4-B]噻吩 - ) - (2-羧酸盐-2-6-二基)](PTB7-TH),富勒烯衍生物苯基-C-71 - 配制 - 配制酸甲酯(PCBM)和不同的Cu 2 S NCS的不同WT%,并用于制造具有ITO / ZnO / PTB7-TH的装置架构的三元OSC:Cu2S NCS:PCBM / Moo3 / Ag。 已经观察到,随着3wt%的Cu 2 S NCs,获得8.20%的改善的功率转换效率(PCE)对于参考装置的PCE为6.96%。 EIS测量和AFM研究表明,Cu2S NCS的存在有助于形成级联能量水平,提供更平滑的表面,并有助于抑制疏水阀辅助重组。

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  • 来源
    《RSC Advances》 |2019年第13期|共7页
  • 作者单位

    Jankidevi Bajaj Coll Sci Dept Phys Wardha 442001 India;

    Vidyabharati Mahavidyalaya Dept Phys Amravati 444602 India;

    Ctr Mat Elect Technol Off Pashan Rd Pune 411008 Maharashtra India;

    Ctr Mat Elect Technol Off Pashan Rd Pune 411008 Maharashtra India;

    BML Munjal Univ Sch Engn &

    Technol Gurgaon 122413 India;

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  • 正文语种 eng
  • 中图分类 化学;
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