Capillary Printing of Highly Aligned Silver Nanowires Electrodes for High efficient polymer optoelectronic devices

Taehyo Kim^a, Jin Young Kim^a

^aUNIST, UNIST-gil 50,Eon-Yang Eup, Ul-Ju Gun, Ulsan, Republic of Korea, Ulsan, 689, Korea, Republic of

International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics 2015 (HOPV15)

Roma, Italy, 2015 May 11th - 13th

Organizer: Filippo De Angelis

Poster, Taehyo Kim, 366
Publication date: 5th February 2015

The metallic NWs have shown very promising candidates for optoelectronic device due to the intrinsic high conductivity and aspect ratio.^{1, 2} we introduce a simple and high throughput fabrication strategy for the aligned assembly of AgNWs by using a capillary printing technique, which is a rapid and scalable method compatible with existing roll-to-roll processes for the fabrication of highly conductive and transparent electrodes. Our approach has several advantages in the fabrication of transparent electrodes based on AgNW films such as a simple solution-based process, improvement of electrical conductivity and optical transmittance and NW-NW junction resistances compared to randomly oriented structure. Here, we fabricate solution-processed polymer light-emitting diodes (PLEDs) using randomly oriented Ag NWs and aligned Ag NWs electrode. The device with aligned AgNWs showed significantly enhanced light emitting characteristics with a maximum electroluminance, electroluminescence(EL) efficiency, and power efficiency of 33068 cd m^-2, 14.25 cd A^-1, 10.62 lm W^-1, respectively. This device efficiencies are the highest value reported to date for Ag NWs based fluorescent PLEDs.
Figure1. alignment process of Ag NWs electrode and Device structure of PLEDs with randomly oriented Ag NWs and aligned Ag NWs
[1] Zhibin Yu, Qingwu Zhang, Lu Li, Qu Chen, Xiaofan Niu, Jun Liu, and Qibing Pei. Adv.Mater. 2011, 23, 664-668. [2] Lu Li , Zhibin Yu , Weili Hu , Chia-hao Chang , Qi Chen , and Qibing Pei. Adv. Mater. 2011, 23, 5563-5567.

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