Improving performance of carrier extraction by using ZnO nanorod array in PBDTTT-C-T: PC71BM polymer photovoltaics with inverted structure

Author

Shao-Hsuan Kao ; Ping-Yi Ho ; Chia-Yu Kao ; Ching-Fuh Lin

Author_Institution

Grad. Inst. of Photonics & Optoelectron., Nat. Taiwan Univ., Taipei, Taiwan

fYear

2013

fDate

16-21 June 2013

Firstpage

2723

Lastpage

2725

Abstract

Applying ZnO nanorod array in organic solar cells is a good method to improve the device power conversion efficiency. The method has broad applicability potential in various kinds of material systems. In this work, we control ZnO nanorod morphlogy to increase the total contact area and provide straight channels for carrier extraction in PBDTTT-C-T:PC₇₁BM inverted solar cells. In optimization, we adjust the ratio of zinc nitrate and HMT in growth-promoting solution to control the ZnO nanorod array morphology for good polymer infiltration. As a result, J_SC is enhanced from 11.6mA/cm² to 16.5mA/cm², and PCE is increased from about 5% to above 7%.

Keywords

nanorods; organic semiconductors; polymers; solar cells; PBDTTT-C- T:PC₇₁BM inverted solar cells; PBDTTT-C-T:PC₇₁BM polymer photovoltaics; PCE; carrier extraction; contact area; growth-promoting solution; inverted structure; nanorod array morphology; nanorod morphlogy; organic solar cells; polymer infiltration; power conversion; zinc nitrate; Arrays; Nanoscale devices; Photovoltaic cells; Polymers; Zinc oxide; PBDTTT-C-T; ZnO; carrier extraction; inverted; nanorod; organic; photovoltaics;

fLanguage

English

Publisher

ieee

Conference_Titel

Photovoltaic Specialists Conference (PVSC), 2013 IEEE 39th

Conference_Location

Tampa, FL

Type

conf

DOI

10.1109/PVSC.2013.6745036

Filename

6745036