Show simple item record

dc.contributor.authorLiu, Xin
dc.contributor.authorWang, Danhao
dc.contributor.authorKang, Yang
dc.contributor.authorFang, Shi
dc.contributor.authorYu, Huabin
dc.contributor.authorZhang, Haochen
dc.contributor.authorMemon, Muhammad Hunain
dc.contributor.authorHe, Jr-Hau
dc.contributor.authorOoi, Boon S.
dc.contributor.authorSun, Haiding
dc.contributor.authorLong, Shibing
dc.date.accessioned2021-10-25T08:41:30Z
dc.date.available2021-10-25T08:41:30Z
dc.date.issued2021-10-22
dc.date.submitted2021-05-12
dc.identifier.citationLiu, X., Wang, D., Kang, Y., Fang, S., Yu, H., Zhang, H., … Long, S. (2021). Photovoltage-Competing Dynamics in Photoelectrochemical Devices: Achieving Self-Powered Spectrally Distinctive Photodetection. Advanced Functional Materials, 2104515. doi:10.1002/adfm.202104515
dc.identifier.issn1616-301X
dc.identifier.issn1616-3028
dc.identifier.doi10.1002/adfm.202104515
dc.identifier.urihttp://hdl.handle.net/10754/672943
dc.description.abstractMultiple-band and spectrally distinctive photodetection play critical roles in building next-generation colorful imaging, spectroscopy, artificial vision, and optically controlled logic circuits of the future. Unfortunately, it remains challenging for conventional semiconductor photodetectors to distinguish different spectrum bands with photon energy above the bandgap of the material. Herein, for the first time, a photocurrent polarity-switchable photoelectrochemical device composed of group III-nitride semiconductors, demonstrating a positive photocurrent density of 10.54 µA cm−2 upon 254 nm illumination and a negative photocurrent density of −0.08 µA cm−2 under 365 nm illumination without external power supply, is constructed. Such bidirectional photocurrent behavior arises from the photovoltage-competing dynamics across two photoelectrodes. Importantly, a significant boost of the photocurrent and corresponding responsivity under 365 nm illumination can be achieved after decorating the counter electrode of n-type AlGaN nanowires with platinum (Pt) nanoparticles, which promote a more efficient redox reaction in the device. It is envisioned that the photocurrent polarity-switch behavior offers new routes to build multiple-band photodetection devices for complex light-induced sensing systems, covering a wide spectrum band from deep ultraviolet to infrared, by simply engineering the bandgaps of semiconductors.
dc.description.sponsorshipThis work was funded by the National Natural Science Foundation of China (Grant Nos. 51961145110 and 61905236), the Fundamental Research Funds for the Central Universities (Grant No. WK2100230020), and the USTC Research Funds of the Double First-Class Initiative (Grant No. YD3480002002), and was partially carried out at the USTC Center for Micro and Nanoscale Research and Fabrication.
dc.publisherWiley
dc.relation.urlhttps://onlinelibrary.wiley.com/doi/10.1002/adfm.202104515
dc.rightsArchived with thanks to Advanced Functional Materials
dc.titlePhotovoltage-Competing Dynamics in Photoelectrochemical Devices: Achieving Self-Powered Spectrally Distinctive Photodetection
dc.typeArticle
dc.contributor.departmentComputer, Electrical and Mathematical Science and Engineering (CEMSE) Division
dc.contributor.departmentElectrical and Computer Engineering Program
dc.contributor.departmentPhotonics Laboratory
dc.identifier.journalAdvanced Functional Materials
dc.rights.embargodate2022-10-22
dc.eprint.versionPost-print
dc.contributor.institutionSchool of Microelectronics University of Science and Technology of China Hefei Anhui 230026 China
dc.contributor.institutionDepartment of Materials Science and Engineering City University of Hong Kong Kowloon Hong Kong SAR 999077 China
dc.identifier.pages2104515
kaust.personOoi, Boon S.
dc.date.accepted2021-10-05
refterms.dateFOA2021-10-25T11:51:29Z


Files in this item

Thumbnail
Name:
Photovoltage_photovoltage.pdf
Size:
1.751Mb
Format:
PDF
Description:
Accepted manuscript
Embargo End Date:
2022-10-22

This item appears in the following Collection(s)

Show simple item record