Realizing the ultimate goal of fully solution-processed organic solar cells: a compatible self-sintering method to achieve silver back electrode,Journal of Materials Chemistry A

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Realizing the ultimate goal of fully solution-processed organic solar cells: a compatible self-sintering method to achieve silver back electrode
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020/03/13 , DOI: 10.1039/d0ta00807a
Xinjun He _{1,

2,

3,

4} , Yong Wang _{1,

2,

3,

4} , Haifei Lu _{4,

5,

6,

7} , Dan Ouyang _{1,

2,

3,

4} , Zhanfeng Huang _{1,

2,

3,

4} , Wallace C. H. Choy _{1,

2,

3,

4}

Affiliation

It is commonly believed that the ultimate goal of high throughput production of organic solar cells (OSCs) is the fully solution process in the fabrication. While it is highly desirable to form metal back electrodes to complete OSCs by a solution process instead of high-vacuum evaporation to realize the goal, the complex solvents used in typical metal precursor solutions and the post-treatment required such as high-temperature annealing will easily damage active layers and degrade OSC performances. The power conversion efficiencies (PCE) for evaporation-free OSCs have only reached 8%. Besides, there are limited studies that provide clear evidence to successfully eliminate the solvent issue brought by the directly solution-processed metal back electrode. In this work, we demonstrate a compatible self-sintering approach to connect silver nanoparticles (NPs) into a high-quality back electrode. The as-achieved film exhibits a continuous crystal lattice, high purity, excellent conductivity and smooth morphology. Interestingly, since the self-sintering back electrode process is finished in a short time and uses a chemically compatible solvent, it will not degrade the organic active layer and favors high throughput OSCs fabrication. With the back electrode, the fully solution-processed OSCs achieve a PCE of 9.73% which is the highest reported PCE in evaporation-free OSCs to our best knowledge.

中文翻译：

实现完全固溶处理的有机太阳能电池的最终目标：一种兼容的自烧结方法，以实现银背电极

通常认为，高产量生产有机太阳能电池（OSC）的最终目标是在制造过程中采用完全解决方案。尽管非常需要通过溶液工艺而不是高真空蒸发来形成金属背电极以完成OSC，以实现该目标，但在典型的金属前体溶液中使用的复杂溶剂以及所需的后处理（如高温退火）将会容易损坏有源层并降低OSC性能。无蒸发OSC的功率转换效率（PCE）仅达到8％。此外，有限的研究提供了明确的证据来成功消除直接溶液处理的金属背电极带来的溶剂问题。在这项工作中我们展示了一种兼容的自烧结方法，可将银纳米颗粒（NP）连接到高质量的背面电极中。所获得的膜表现出连续的晶格，高纯度，优异的导电性和光滑的形态。有趣的是，由于自烧结背电极工艺可在短时间内完成并使用化学相容性溶剂，因此不会降解有机活性层并有利于高通量OSC的制造。使用背电极，经过完全溶液处理的OSC达到9.73％的PCE，据我们所知，这是无蒸发OSC中报道的最高PCE。由于自烧结背电极工艺可在短时间内完成并使用化学相容性溶剂，因此不会降解有机活性层并有利于高通量OSC的制造。使用背电极，经过完全溶液处理的OSC达到9.73％的PCE，据我们所知，这是无蒸发OSC中报道的最高PCE。由于自烧结背电极工艺可在短时间内完成并使用化学相容性溶剂，因此不会降解有机活性层并有利于高通量OSC的制造。使用背电极，经过完全溶液处理的OSC达到9.73％的PCE，据我们所知，这是无蒸发OSC中报道的最高PCE。

更新日期：2020-03-26

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