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180期

Jung-Yong Lee

作者:  发布:2015-11-24 00:00:00  点击量:

报告题目:Utilizing metal nanostructures for optical and electrical gains in organic optoelectronic devices

  人:Assoc. Prof. Jung-Yong Lee

Korea Advanced Institute of Science and Technology (KAIST), Korea

报告时间:20151124日下午2:50-3:40

报告地点:化学楼二楼一号会议室 

报告人简介:

Ph. D, Stanford University, USA

M. S. Seoul National University, Korea

B. S. Seoul National University, Korea

报告简介:

Here, we investigate the dependence of metal nanoparticles’ size and shape, at various concentrations, on the power conversion efficiency of organic solar cells (OSCs)[1]. Also, we propose a metal-metal core-shell nanocube (NC) as an advanced plasmonic material for highly efficient OSCs. We covered an Au core with a thin Ag shell as a scattering enhancer to build Au@Ag NCs, showing stronger scattering efficiency than pristine Au nanoparticles (AuNPs) throughout the visible range. Highly efficient plasmonic organic solar cells were fabricated by embedding Au@Ag NCs into an anodic buffer layer, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)[2, 3].

In the second part, we demonstrate that the metal nanoparticles can improve the performance of OSCs by boosting the internal quantum efficiency (IQE) of the devices even without a notable plasmonic optical gain.[4] A hybrid layer platform in combination of silver nanoparticles (AgNPs) and polyethylenimine-ethoxylated (PEIE) layer maximized the IQE of the OSCs to nearly 100 %. 2D surface characterization confirmed the AgNPs provided the short path and funneled charge carriers to a cathode, which would effectively raise the carrier mobility. Moreover, the hybrid layer doubled the device half-efficiency lifetime due to longer retention of the improved mobility.

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