Enhancing Light Emission of ZnO-Nanofilm/Si-Micropillar Heterostructure Arrays by Piezo-Phototronic Effect

Xiaoyi Li; Mengxiao Chen; Ruomeng Yu; Taiping Zhang; Dongsheng Song; Renrong Liang; Qinglin Zhang; Shaobo Cheng; Lin Dong; Anlian Pan; Zhong Lin Wang; Jing Zhu; Caofeng Pan

doi:10.1002/adma.201501121

Enhancing Light Emission of ZnO-Nanofilm/Si-Micropillar Heterostructure Arrays by Piezo-Phototronic Effect

Adv Mater. 2015 Aug;27(30):4447-4453. doi: 10.1002/adma.201501121. Epub 2015 Jun 22.

Authors

Xiaoyi Li^{1

2

3}, Mengxiao Chen², Ruomeng Yu⁴, Taiping Zhang², Dongsheng Song¹, Renrong Liang⁵, Qinglin Zhang⁶, Shaobo Cheng^{1

3}, Lin Dong², Anlian Pan⁶, Zhong Lin Wang^{2

4}, Jing Zhu^{1

3}, Caofeng Pan²

Affiliations

¹ National Center for Electron Microscopy in Beijing, School of Materials Science and Engineering, The State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Advanced Materials (MOE), Tsinghua University, Beijing, 100084, P. R. China.
² Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, China.
³ Center for Nano and Micro Mechanics, Tsinghua University, Beijing, 100084, China.
⁴ School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0245, USA.
⁵ Institute of Microelectronics, Tsinghua University, Beijing, 100084, China.
⁶ Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, Hunan University, Changsha, Hunan, 410082, China.

PMID: 26099108
DOI: 10.1002/adma.201501121

Abstract

n-ZnO nanofilm/p-Si micropillar heterostructure light-emitting diode (LED) arrays for white light emissions are achieved and the light emission intensity of LED array is enhanced by 120% under -0.05% compressive strains. These results indicate a promising approach to fabricate Si-based light-emitting components with high performances enhanced by the piezo-phototronic effect, with potential applications in touchpad technology, personalized signatures, smart skin, and silicon-based photonic integrated circuits.

Keywords: piezo-phototronic effects; silicon arrays; white light LED.