High responsivity ultraviolet detector based on novel SnO2 nanoarrays.
Xinhua Pan1, Tao Zhang1, Qiaoqi Lu1
1State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, School of Materials Science and Engineering, Zhejiang University Hangzhou 310027 People's Republic of China panxinhua@zju.edu.cn.
RSC Advances
|May 11, 2022
Summary
Tin oxide nanoarrays (NAs) with a novel morphology were fabricated using gold nanoparticles. These novel SnO2 NAs demonstrate high performance in ultraviolet detectors, even at low bias voltage.
Area of Science:
- Materials Science
- Nanotechnology
- Optoelectronics
Background:
- Tin oxide (SnO2) is a semiconductor with significant potential for optoelectronic applications.
- Developing novel nanostructures is crucial for enhancing material properties.
- Controlling nanoparticle morphology impacts device performance.
Purpose of the Study:
- To fabricate tin oxide nanoarrays (NAs) with a unique morphology.
- To investigate the effect of gold nanoparticles (Au NPs) on SnO2 NA growth.
- To evaluate the performance of SnO2 NA-based ultraviolet (UV) detectors.
Main Methods:
- Hydrothermal synthesis was employed to fabricate SnO2 NAs.
- Gold nanoparticles (Au NPs) were used as a template to induce controlled growth of SnO2 nanorods (NRs).
- The morphology of the fabricated SnO2 NAs was characterized.
Main Results:
- Novel SnO2 NAs were successfully fabricated, with each nanorod composed of approximately ten primary nanorods (width 4-7 nm).
- The use of Au NPs led to smaller and more ordered SnO2 NAs.
- UV detectors fabricated with these SnO2 NAs exhibited high responsivity and external quantum efficiency (EQE).
- High performance was achieved under low UV light intensity (20 μW cm-2) and a low external bias voltage (1 V).
Conclusions:
- The controlled growth of SnO2 NAs using Au NPs is an effective strategy for creating advanced nanostructures.
- The fabricated SnO2 NAs show great promise for high-performance UV detection applications.
- The developed UV detectors offer excellent sensitivity and efficiency under minimal electrical bias.
