PEDOT：PSS的光学化学工程，通过掺入疏水性的Nafion来实现高效稳定的钙钛矿太阳能电池,ACS Applied Materials & Interfaces

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PEDOT：PSS的光学化学工程，通过掺入疏水性的Nafion来实现高效稳定的钙钛矿太阳能电池
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-01-17 00:00:00 , DOI: 10.1021/acsami.7b19053
Shuang Ma ₁ , Wenyuan Qiao ₁ , Tai Cheng ₁ , Bing Zhang ₁ , Jianxi Yao ₁ , Ahmed Alsaedi ₂ , Tasawar Hayat _{2,

3} , Yong Ding ₁ , Zhan’ao Tan ₁ , Songyuan Dai _{1,

2}

Affiliation

在PIN型钙钛矿太阳能电池（PSC）中，聚（3,4-乙撑二氧噻吩）-聚（苯乙烯磺酸盐）（PEDOT：PSS）空穴传输层（HTL）的吸湿性和酸度对器件稳定性具有关键影响。为了消除这些问题，通过简单的旋涂工艺将疏水性全氟磺酸共聚物Nafion掺入PEDOT：PSS中。对于改性膜，Nafion / PSSH（聚（苯乙烯磺酸盐）酸）充当表面上的电子阻挡层，并且富含PEDOT的畴倾向于聚集成较大的颗粒，膜内部的链间电荷转移更好。因此，改进的PEDOT：PSS HTL表现出增强的电导率和透光率以及更佳的功函，最终以增加的短路电流密度（J _sc）和设备的开路电压（V _oc）。最后，与仅使用PEDOT：PSS的设备（13.51％）相比，带有Nafion修饰的HTL的PSC达到了16.72％的最佳电源转换效率，提高了23.76％。最重要的是，由于在PEDOT：PSS膜表面富集的Nafion聚合物的疏水性以及化学和机械稳定性，因此明显提高了设备的稳定性。

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Optical–Electrical–Chemical Engineering of PEDOT:PSS by Incorporation of Hydrophobic Nafion for Efficient and Stable Perovskite Solar Cells

In PIN-type perovskite solar cells (PSCs), the hydroscopicity and acidity of the poly(3,4-ethylenedioxythiophene)-poly(styrene-sulfonate) (PEDOT:PSS) hole transport layer (HTL) have critical influences on the device stability. To eliminate these problems, Nafion, the hydrophobic perfluorosulfonic copolymer, is incorporated into PEDOT:PSS by a simple spin-coating process. For the modified film, Nafion/PSSH (poly(styrene sulfonate) acid) acts as an electron-blocking layer on the surface and the PEDOT-rich domain tends to gather into larger particles with better interchain charge transfer inside the film. Consequently, the modified PEDOT:PSS HTL shows enhanced conductivity and light transmittance as well as more favorable work function, ending up with the increased short-circuit current density (J_sc) and open-circuit voltage (V_oc) of the device. Finally, PSCs with Nafion-modified HTLs achieve the best power conversion efficiency of 16.72%, with 23.76% improvement compared with PEDOT:PSS-only devices (13.51%). Most importantly, the device stability is obviously enhanced because of the hydrophobicity and chemical and mechanical stability of the Nafion polymer that is enriched on the surface of the PEDOT:PSS film.

更新日期：2018-01-17

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