
Drs. Longwei Ding
Center for Nanoscale Characterization and Devices, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, China
Authors | Longwei Ding , Nishuang Liu , Luying Li , Xing Wei , Xianghui Zhang , Jun Su , Jiangyu Rao , Congxing Yang , Wenzhi Li , Jianbo Wang , Haoshuang Gu , and Yihua Gao Email | gaoyihua@hust.edu.cn
Application | Graphene-Skeleton Heat-Coordinated and Nanoamorphous- Surface-State Controlled Pseudo-Negative-Photoconductivity of Tiny SnO 2 Nanoparticles |
Authors | Longwei Ding , Nishuang Liu , Luying Li , Xing Wei , Xianghui Zhang , Jun Su , Jiangyu Rao , Congxing Yang , Wenzhi Li , Jianbo Wang , Haoshuang Gu , and Yihua Gao |
Journal | Advanced Materials. 2015 |
Publication | Full Publication Here – DOI: 10.1002/adma.201500804 |
Graphene-Skeleton Heat-Coordinated and Nanoamorphous- Surface-State Controlled Pseudo-Negative-Photoconductivity of Tiny SnO 2 Nanoparticless
Abstract: SnO2 nanoparticles display a pseudo-negative-photoconductivity (PsdNPC) effect, which shows that their resistance increases under light irradiation via a heating effect. The PsdNPC originates from intensive electron scattering of the nanoamorphous surface state of the SnO2nanoparticles, resulting in a small inner current and a large absorption of moisture, leading to a large surface current. Graphene as the inner skeleton can shorten the response and recovery times.
The SnO 2 nanoparticle has an amorphous surface shell yellow) and crystallized core (purple). e,f) The moisture molecules are released and absorbed with temperature increase and decrease, and surface conductivity becomes worse and better, respectively.