Tuning the Photoresponse of Nano-Heterojunction: Pressure-Induced Inverse Photoconductance in Functionalized WO 3 Nanocuboids
Abstract
Inverse photoconductivity (IPC) is a unique photoresponse behavior that exists in few photoconductors in which electrical conductivity decreases with irradiation, and has great potential applications in the development of photonic devices and nonvolatile memories with low power consumption. However, it is still challenging to design and achieve IPC in most materials of interest. In this study, pressure-driven photoconductivity is investigated in n-type WO3 nanocuboids functionalized with p-type CuO nanoparticles under visible illumination and an interesting pressure-induced IPC accompanying a structural phase transition is found. Native and structural distortion induced oxygen vacancies assist the charge carrier trapping and favor the persistent positive photoconductivity beyond 6.4 GPa. The change in photoconductivity is mainly related to a phase transition and the associated changes in the bandgap, the trapping of charge carriers, the WO6 octahedral distortion, and the electron–hole pair recombination process. A unique reversible transition from positive to inverse photoconductivity is observed during compression and decompression. The origin of the IPC is intimately connected to the depletion of the conduction channels by electron trapping and the chromic property of WO3. This synergistic rationale may afford a simple and powerful method to improve the optomechanical performance of any hybrid material.
- Authors:
-
[2];
[3];
[4];
[6];
[7];
[8];
[9]
- Center for High Pressure Science and Technology Advanced Research Shanghai 201203 China; Department of Chemical PhysicsUniversity of Science and Technology of China Hefei 230026 China
- Center for High Pressure Science and Technology Advanced Research Shanghai 201203 China; HYU‐HPSTAR‐CIS High Pressure Research CenterDepartment of PhysicsHanyang University Seoul 04763 Republic of Korea
- Institute of Solid State PhysicsUniversity of Latvia Kengaraga street 8 LV‐1063 Riga Latvia
- Departamento de Física Aplicada‐ICMUVMALTA Consolider TeamUniversidad de ValenciaEdificio de Investigación C/Dr. Moliner 50 Burjassot 46100 Valencia Spain
- Center for High Pressure Science and Technology Advanced Research Shanghai 201203 China; Shanghai Institute of Technical PhysicsChinese Academy of Science Shanghai 201800 China
- X‐Ray Science DivisionAdvanced Photon SourceArgonne National Laboratory 9700 South Cass Avenue Argonne IL 60439 USA
- HYU‐HPSTAR‐CIS High Pressure Research CenterDepartment of PhysicsHanyang University Seoul 04763 Republic of Korea
- Department of Chemical PhysicsUniversity of Science and Technology of China Hefei 230026 China
- Center for High Pressure Science and Technology Advanced Research Shanghai 201203 China
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Natural Science Foundation of China; NSAF Joint Fund; Science Challenging Program; MINECO; Generalitat Valenciana; SSRF; APS
- OSTI Identifier:
- 1623474
- Grant/Contract Number:
- AC02-06CH11357; 11874076; U1530402; TZ2016001; MAT2016‐75586‐C4‐1‐P; Prometeo/2018/123
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Advanced Science
- Additional Journal Information:
- Journal Volume: 6; Journal Issue: 19; Journal ID: ISSN 2198-3844
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Chemistry; Science & Technology - Other Topics; Materials Science
Citation Formats
Rahman, Saqib, Samanta, Sudeshna, Kuzmin, Alexei, Errandonea, Daniel, Saqib, Hajra, Brewe, Dale L., Kim, Jaeyong, Lu, Junling, and Wang, Lin. Tuning the Photoresponse of Nano-Heterojunction: Pressure-Induced Inverse Photoconductance in Functionalized WO 3 Nanocuboids. United States: N. p., 2019.
Web. https://doi.org/10.1002/advs.201901132.
Rahman, Saqib, Samanta, Sudeshna, Kuzmin, Alexei, Errandonea, Daniel, Saqib, Hajra, Brewe, Dale L., Kim, Jaeyong, Lu, Junling, & Wang, Lin. Tuning the Photoresponse of Nano-Heterojunction: Pressure-Induced Inverse Photoconductance in Functionalized WO 3 Nanocuboids. United States. https://doi.org/10.1002/advs.201901132
Rahman, Saqib, Samanta, Sudeshna, Kuzmin, Alexei, Errandonea, Daniel, Saqib, Hajra, Brewe, Dale L., Kim, Jaeyong, Lu, Junling, and Wang, Lin. Thu .
"Tuning the Photoresponse of Nano-Heterojunction: Pressure-Induced Inverse Photoconductance in Functionalized WO 3 Nanocuboids". United States. https://doi.org/10.1002/advs.201901132. https://www.osti.gov/servlets/purl/1623474.
@article{osti_1623474,
title = {Tuning the Photoresponse of Nano-Heterojunction: Pressure-Induced Inverse Photoconductance in Functionalized WO 3 Nanocuboids},
author = {Rahman, Saqib and Samanta, Sudeshna and Kuzmin, Alexei and Errandonea, Daniel and Saqib, Hajra and Brewe, Dale L. and Kim, Jaeyong and Lu, Junling and Wang, Lin},
abstractNote = {Inverse photoconductivity (IPC) is a unique photoresponse behavior that exists in few photoconductors in which electrical conductivity decreases with irradiation, and has great potential applications in the development of photonic devices and nonvolatile memories with low power consumption. However, it is still challenging to design and achieve IPC in most materials of interest. In this study, pressure-driven photoconductivity is investigated in n-type WO3 nanocuboids functionalized with p-type CuO nanoparticles under visible illumination and an interesting pressure-induced IPC accompanying a structural phase transition is found. Native and structural distortion induced oxygen vacancies assist the charge carrier trapping and favor the persistent positive photoconductivity beyond 6.4 GPa. The change in photoconductivity is mainly related to a phase transition and the associated changes in the bandgap, the trapping of charge carriers, the WO6 octahedral distortion, and the electron–hole pair recombination process. A unique reversible transition from positive to inverse photoconductivity is observed during compression and decompression. The origin of the IPC is intimately connected to the depletion of the conduction channels by electron trapping and the chromic property of WO3. This synergistic rationale may afford a simple and powerful method to improve the optomechanical performance of any hybrid material.},
doi = {10.1002/advs.201901132},
journal = {Advanced Science},
number = 19,
volume = 6,
place = {United States},
year = {2019},
month = {8}
}
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Figures / Tables:
Figure 1: The transient photoresponse with time at low-bias: a) from 0–6.4 GPa without any PrPPC, b) from 10.6–25.6 GPa with a significant amount of PrIPC, and c) from 29.6–34 GPa with 28 GPa (decompression) with a reversible swing from PPC to IPC.
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