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首页> 外文期刊>Advanced energy materials >Self-Organization of Polymer Additive, Poly(2-vinylpyridine) via One-Step Solution Processing to Enhance the Efficiency and Stability of Polymer Solar Cells
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Self-Organization of Polymer Additive, Poly(2-vinylpyridine) via One-Step Solution Processing to Enhance the Efficiency and Stability of Polymer Solar Cells

机译：聚合物添加剂聚（2-乙烯基吡啶）通过一步溶液处理自组织以增强聚合物太阳能电池的效率和稳定性

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摘要

Interfaces between the photoactive layers and electrodes play critical roles in controlling the performance of optoelectronic devices. Herein, a novel nonconjugated polymer additive (nPA), poly(2-vinylpyridine) (P2VP), is reported for modifying the interfaces between the bulk-heterojunction (BHJ) and cathode/metal oxide (MO) layers. The P2VP nPA enables remarkably enhanced power conversion efficiencies (PCEs) and ambient stability in different types of polymer solar cells (PSCs). Importantly, interfacial engineering can be achieved during deposition of the P2VP nPA-containing BHJ active layer via simple, one-step solution processing. The P2VP nPA has much higher surface energy than the BHJ active components and stronger interaction with the surface of MO, which affords spontaneous vertical phase separation from the BHJ layer on the MO surface by one-step solution processing. The self-assembled P2VP layer substantially reduces the work function and surface defect density of MO, thereby minimizing the charge-extraction barrier and increasing the PCEs of the PSCs significantly, i.e., PTB7-Th: PC71BM (10.53%-> 11.14%), PTB7:PC71BM (7.37%-> 8.67%), and PTB7-Th:P(NDI2HD-T) all-PSCs (5.52%-> 6.14%). In addition, the lifetimes of the PSCs are greatly improved by the use of the P2VP nPA.
机译：光敏层和电极之间的界面在控制光电器件的性能中起着至关重要的作用。本文中，报道了一种新颖的非共轭聚合物添加剂（nPA），聚（2-乙烯基吡啶）（P2VP），用于修饰本体异质结（BHJ）和阴极/金属氧化物（MO）层之间的界面。 P2VP nPA可在不同类型的聚合物太阳能电池（PSC）中显着提高功率转换效率（PCE）和环境稳定性。重要的是，在沉积含P2VP nPA的BHJ活性层的过程中，可以通过简单的一步式溶液处理来实现界面工程。 P2VP nPA具有比BHJ活性组分高得多的表面能，并且与MO表面的相互作用更强，这可以通过一步溶液处理从MO表面上的BHJ层自发进行垂直相分离。自组装的P2VP层大大降低了MO的功函数和表面缺陷密度，从而最大程度地减小了电荷提取势垒，并显着提高了PSC的PCE，即PTB7-Th：PC71BM（10.53％-> 11.14％）， PTB7：PC71BM（7.37％-> 8.67％）和PTB7-Th：P（NDI2HD-T）全PSC（5.52％-> 6.14％）。另外，通过使用P2VP nPA，可以大大提高PSC的寿命。

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  • 来源
    《Advanced energy materials》 |2017年第17期|1602812.1-1602812.9|共9页
  • 作者

    Lee Wonho; Jeong Seonju; Lee Changyeon; Han Gibok; Cho Changsoon; Lee Jung-Yong; Kim Bumjoon J.;

  • 作者单位

    Korea Adv Inst Sci & Technol, Dept Chem & Biomol Engn, Daejeon 34141, South Korea;

    Korea Adv Inst Sci & Technol, Grad Sch Energy Environm Water & Sustainabil EEWS, Daejeon 34141, South Korea;

    Korea Adv Inst Sci & Technol, Dept Chem & Biomol Engn, Daejeon 34141, South Korea;

    Korea Adv Inst Sci & Technol, Dept Chem & Biomol Engn, Daejeon 34141, South Korea;

    Korea Adv Inst Sci & Technol, Grad Sch Energy Environm Water & Sustainabil EEWS, Daejeon 34141, South Korea;

    Korea Adv Inst Sci & Technol, Grad Sch Energy Environm Water & Sustainabil EEWS, Daejeon 34141, South Korea;

    Korea Adv Inst Sci & Technol, Dept Chem & Biomol Engn, Daejeon 34141, South Korea;

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  • 正文语种 eng
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  • 关键词

    device stability; one-step process; polymer additives; polymer solar cells; work function reduction;

    机译：器件稳定性;一步法;聚合物添加剂;聚合物太阳能电池;功函数降低;

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