journal article·2019-10-28

Coupling Enhancement of Photo-Thermoelectric Conversion in a Lateral ZnO Nanowire Array

Kewei Zhang, Bangsen Ouyang, Yuanhao Wang, Yanzhi Xia, Ya Yang

ACS Applied Energy Materials· Volume 2· Issue 10
Publisher page

Abstract

Scavenging sustainable energy from surroundings by the photothermoelectric effect has attracted considerable attention along with the growing crisis of energy security. The cross interaction between heat and light is important for understanding the photothermoelectric mechanism. Herein, we demonstrate a photothermoelectric device based on an undoped ZnO nanowire array with a lateral structure. The output of the ZnO nanowire array depends linearly on the position of the light spot with zero output for the light spot in the center, achieving a power factor of 85 μW m–1 K–2 at room temperature. A coupling enhancement (″1 + 1 > 2″) of photothermoelectric conversion is observed in the ZnO device. To reveal the intrinsic mechanism, the cross interaction between heat and light was investigated under various working conditions. Under a temperature gradient of 12.5 K, the output current and voltage of the lateral ZnO device under 227.4 mW/cm2 light illumination are enhanced by 67.2% and 10.9%, respectively. This study reveals the cross interactions in the process of photothermoelectric conversion and might have guiding significance in solar energy harvesting applications.
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Research context

OpenAlex topics: Advanced Thermoelectric Materials and Devices · Advanced Sensor and Energy Harvesting Materials · Solar-Powered Water Purification Methods

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-Nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, P. R. China

State Key Laboratory of Bio-fibers and Eco-textiles, Collaborative Innovation Center of Shandong Marine Biobased Fibers and Ecological Textiles, College of Materials Science and Engineering, Institute of Marine Biobased Materials, Qingdao University, Qingdao 266071, P. R. China

Hoffmann Institute of Advanced Materials, Shenzhen Polytechnic, 7098 Liuxian Blvd, Nanshan, Shenzhen 518055, P. R. China

School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100190, P. R. China

Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning, 530004, P. R. China

Funding

University of Chinese Academy of Sciences · Shandong Province · Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China · Chinese Academy of Sciences · Thousands Talents Program for Pioneer Researcher and his Innovation Team · 2015 Annual Beijing Talents Fund · External Cooperation Program of BIC · Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University

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