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High-Performance Polymer Solar Cells Enabled by Copper Nanoparticles-Induced Plasmon Resonance Enhancement
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2016-04-14 00:00:00 , DOI: 10.1021/acs.jpcc.6b02802 Ping Shen , Yan Liu 1 , Yongbing Long 2 , Liang Shen , Bonan Kang
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2016-04-14 00:00:00 , DOI: 10.1021/acs.jpcc.6b02802 Ping Shen , Yan Liu 1 , Yongbing Long 2 , Liang Shen , Bonan Kang
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The surface plasmon resonance (SPR) effect based on noble metal nanoparticles (NPs) such as gold(Au) and silver(Ag) has been widely investigated and demonstrated to be a breakthrough technology to further improve the power conversion efficiency (PCE) of polymer solar cells (PSCs). Herein, diameter-controlled copper (Cu) NPs were intentionally introduced into an anode buffer layer of tungsten trioxide (WO3) by the thermally evaporating method, structuring a light trapping center to enhance light absorption of PSCs. The big difference of surface energy between WO3 and Cu can induce the growth process of Cu NPs from nucleation to isolated island by controlling evaporating thickness, yielding multiple SPR centers to radiate the electromagnetic wave toward the active layer. The steady-state photoluminescence (PL) results provide direct evidence that Cu NPs-induced SPR effect can effectively enhance light absorption of the active layer at visible wavelength, leading to a significant improvement of the short current density (Jsc) by 35.3% and PCE by 37.2% for devices with 3 nm Cu. Encouragingly, the inclusion of Cu NPs simultaneously decreases device resistance determined by complex impedance spectra. We believe the low-cost, simple-fabricated evaporating method combined with SPR enhancement can pave the way to high-performance PSCs.
中文翻译：
铜纳米粒子诱导的等离子体共振增强实现的高性能聚合物太阳能电池
基于金（Au）和银（Ag）等贵金属纳米粒子（NPs）的表面等离子体共振（SPR）效应已得到广泛研究，并被证明是进一步提高聚合物的功率转换效率（PCE）的突破性技术太阳能电池（PSC）。在本文中，通过热蒸发方法将直径受控的铜（Cu）NPs有意地引入三氧化钨（WO 3）的阳极缓冲层中，以构造光捕获中心以增强PSC的光吸收。WO 3之间的表面能差异很大通过控制蒸发厚度，Cu可以诱导Cu NPs从成核到孤岛的生长过程，产生多个SPR中心，向活性层辐射电磁波。稳态光致发光（PL）结果提供了直接证据，表明Cu NPs诱导的SPR效应可以有效增强活性层在可见波长处的光吸收，从而使短路电流密度（J sc）显着提高35.3％，并且对于具有3 nm Cu的器件，PCE降低了37.2％。令人鼓舞的是，包含铜纳米颗粒同时降低了由复杂阻抗谱确定的器件电阻。我们认为，低成本，简单的蒸发方法与SPR增强相结合可以为高性能PSC铺平道路。
更新日期：2016-04-14
中文翻译：
铜纳米粒子诱导的等离子体共振增强实现的高性能聚合物太阳能电池
基于金（Au）和银（Ag）等贵金属纳米粒子（NPs）的表面等离子体共振（SPR）效应已得到广泛研究，并被证明是进一步提高聚合物的功率转换效率（PCE）的突破性技术太阳能电池（PSC）。在本文中，通过热蒸发方法将直径受控的铜（Cu）NPs有意地引入三氧化钨（WO 3）的阳极缓冲层中，以构造光捕获中心以增强PSC的光吸收。WO 3之间的表面能差异很大通过控制蒸发厚度，Cu可以诱导Cu NPs从成核到孤岛的生长过程，产生多个SPR中心，向活性层辐射电磁波。稳态光致发光（PL）结果提供了直接证据，表明Cu NPs诱导的SPR效应可以有效增强活性层在可见波长处的光吸收，从而使短路电流密度（J sc）显着提高35.3％，并且对于具有3 nm Cu的器件，PCE降低了37.2％。令人鼓舞的是，包含铜纳米颗粒同时降低了由复杂阻抗谱确定的器件电阻。我们认为，低成本，简单的蒸发方法与SPR增强相结合可以为高性能PSC铺平道路。
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