Improved efficiency in fullerene and non-fullerene polymer solar cells having an interdigitated interface with the electron transport layer†,Materials Chemistry Frontiers

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Improved efficiency in fullerene and non-fullerene polymer solar cells having an interdigitated interface with the electron transport layer†
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2018-08-09 00:00:00 , DOI: 10.1039/c8qm00347e
Yu Yan _{1,

2,

3,

4,

5} , Wei Li _{1,

2,

3,

4,

5} , Jinlong Cai _{1,

2,

3,

4,

5} , Mengxue Chen _{1,

2,

3,

4,

5} , Yuchao Mao _{1,

2,

3,

4,

5} , Xiaolong Chen _{1,

2,

3,

4,

5} , Robert S. Gurney _{1,

2,

3,

4,

5} , Dan Liu _{1,

2,

3,

4,

5} , Fei Huang _{4,

6,

7,

8,

9} , Tao Wang _{1,

2,

3,

4,

5}

Affiliation

We report improved efficiency in fullerene and non-fullerene polymer solar cells utilizing an interdigitated interface between the photoactive layer and the PFN-OX electron transport layer (ETL). This interdigitated interface is formed in situ during the solution casting process of the photoactive layer on the blend films made of electron-transporting PFN-OX and template materials of either semi-conducting 3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone))-5,5,11,11-tetrakis((4-hexylphenyl)-dithieno[2,3-d:2′,3′-d′]-s-indaceno[1,2-b:5,6-b′]dithiophene) (ITIC) or insulating polystyrene (PS). Compared to the devices having a planar interface between PFN-OX and the photoactive layer, devices with an interdigitated interface templated by ITIC increased the efficiency of PTB7-Th:PC₇₁BM solar cells from 9.3% to 10.4%, with the device having an interdigitated interface templated by PS exhibiting a PCE of 9.9%. PTB7-Th:ITIC non-fullerene solar cells employing this ITIC-templated interdigitated PFN-OX ETL exhibited an enhanced PCE from 7.4% to 8.3%. Interfacial charge transport studies support that favorable electrical doping of PFN-OX to ITIC as well as charge transfer between PTB7-Th and ITIC contribute to this superior efficiency enhancement in devices employing an ITIC-templated interdigitated PFN-OX ETL. This work provides a new strategy for constructing a novel ETL to prepare high efficiency polymer solar cells.

中文翻译：

与电子传输层具有叉指界面的富勒烯和非富勒烯聚合物太阳能电池的效率提高†

我们报道了利用光敏层和PFN-OX电子传输层（ETL）之间的叉指界面提高了富勒烯和非富勒烯聚合物太阳能电池的效率。此互相交叉的界面上形成原位期间制成的共混物薄膜的光敏层的溶液流延法的电子传输PFN-OX和任一半导电3,9-双（2-亚甲基的模板材料（3-（ 1,1-二氰基亚甲基）-茚满酮））-5,5,11,11-四（（4-己基苯基）-二硫代[2,3- d：2'，3' - d ']-s-茚满[1 ，2- b：5,6- b']二噻吩（ITIC）或绝缘聚苯乙烯（PS）。与在PFN-OX和光敏层之间具有平面界面的器件相比，具有由ITIC模板化的叉指界面的器件提高了PTB7-Th：PC ₇₁的效率。从9.3％到10.4％的BM太阳能电池，具有以PS为模板的叉指式界面的器件的PCE为9.9％。使用此ITIC模板叉指式PFN-OX ETL的PTB7-Th：ITIC非富勒烯太阳能电池的PCE值从7.4％提高到8.3％。界面电荷传输研究支持PFN-OX到ITIC的良好电掺杂以及PTB7-Th和ITIC之间的电荷转移有助于在采用ITIC模板的叉指式PFN-OX ETL的设备中提高这种效率。这项工作为构建新型ETL以制备高效聚合物太阳能电池提供了新的策略。

更新日期：2018-08-09

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