Charge transport dynamics of a C6H4NH2CuBr2I/TiO2 heterojunction in aqueous solution under reverse bias
The photocurrent output of the C6H4NH2CuBr2I/TiO2 heterojunction photoelectrode in an aqueous solution is super stable even after 30 000 s. However, the photocurrent is extremely weak. Intensity-modulated photocurrent spectroscopy revealed that the electron transfer in the C6H4NH2CuBr2I/TiO2 photoel...
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| Veröffentlicht in: | Physical chemistry chemical physics : PCCP 2023-01, Vol.25 (2), p.932-935 |
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| container_title | Physical chemistry chemical physics : PCCP |
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| creator | Cheng, Pujia Lv, Wenjing Shi, Zhili Zhan, Kaidong Liu, Yaqi Quinn, Qiao Wu, Fan |
| description | The photocurrent output of the C6H4NH2CuBr2I/TiO2 heterojunction photoelectrode in an aqueous solution is super stable even after 30 000 s. However, the photocurrent is extremely weak. Intensity-modulated photocurrent spectroscopy revealed that the electron transfer in the C6H4NH2CuBr2I/TiO2 photoelectrode without bias is not sufficiently fast to compete with the charge recombination process due to the short diffusion length (∼23 nm), resulting in a low photocurrent. The charge separation and charge transfer efficiency in the bulk of C6H4NH2CuBr2I could be significantly improved under a small reverse electric field (Er), resulting in an enhanced photocurrent. |
| doi_str_mv | 10.1039/d2cp04552d |
| format | Article |
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However, the photocurrent is extremely weak. Intensity-modulated photocurrent spectroscopy revealed that the electron transfer in the C6H4NH2CuBr2I/TiO2 photoelectrode without bias is not sufficiently fast to compete with the charge recombination process due to the short diffusion length (∼23 nm), resulting in a low photocurrent. The charge separation and charge transfer efficiency in the bulk of C6H4NH2CuBr2I could be significantly improved under a small reverse electric field (Er), resulting in an enhanced photocurrent.</description><identifier>ISSN: 1463-9076</identifier><identifier>EISSN: 1463-9084</identifier><identifier>DOI: 10.1039/d2cp04552d</identifier><language>eng</language><publisher>Cambridge: Royal Society of Chemistry</publisher><subject>Aqueous solutions ; Bias ; Charge efficiency ; Charge transfer ; Charge transport ; Diffusion length ; Electric fields ; Electron transfer ; Heterojunctions ; Photoelectric effect ; Photoelectric emission ; Titanium dioxide</subject><ispartof>Physical chemistry chemical physics : PCCP, 2023-01, Vol.25 (2), p.932-935</ispartof><rights>Copyright Royal Society of Chemistry 2023</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids></links><search><creatorcontrib>Cheng, Pujia</creatorcontrib><creatorcontrib>Lv, Wenjing</creatorcontrib><creatorcontrib>Shi, Zhili</creatorcontrib><creatorcontrib>Zhan, Kaidong</creatorcontrib><creatorcontrib>Liu, Yaqi</creatorcontrib><creatorcontrib>Quinn, Qiao</creatorcontrib><creatorcontrib>Wu, Fan</creatorcontrib><title>Charge transport dynamics of a C6H4NH2CuBr2I/TiO2 heterojunction in aqueous solution under reverse bias</title><title>Physical chemistry chemical physics : PCCP</title><description>The photocurrent output of the C6H4NH2CuBr2I/TiO2 heterojunction photoelectrode in an aqueous solution is super stable even after 30 000 s. However, the photocurrent is extremely weak. Intensity-modulated photocurrent spectroscopy revealed that the electron transfer in the C6H4NH2CuBr2I/TiO2 photoelectrode without bias is not sufficiently fast to compete with the charge recombination process due to the short diffusion length (∼23 nm), resulting in a low photocurrent. The charge separation and charge transfer efficiency in the bulk of C6H4NH2CuBr2I could be significantly improved under a small reverse electric field (Er), resulting in an enhanced photocurrent.</description><subject>Aqueous solutions</subject><subject>Bias</subject><subject>Charge efficiency</subject><subject>Charge transfer</subject><subject>Charge transport</subject><subject>Diffusion length</subject><subject>Electric fields</subject><subject>Electron transfer</subject><subject>Heterojunctions</subject><subject>Photoelectric effect</subject><subject>Photoelectric emission</subject><subject>Titanium dioxide</subject><issn>1463-9076</issn><issn>1463-9084</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><recordid>eNpdj8tOwzAQRS0EEqWw4QsssWETOn7ESZYQAa1U0U1ZV649aVOldrBjJP6e8BALVnN1dXR1hpBrBncMRDWz3PQg85zbEzJhUomsglKe_uVCnZOLGA8AwHImJmRX73XYIR2CdrH3YaD2w-ljayL1DdW0VnP5Mud1egh8MVu3K073OGDwh-TM0HpHW0f1W0KfIo2-S99dchYDDfiOISLdtjpekrNGdxGvfu-UvD49rut5tlw9L-r7ZdZzpoZMlExyibYyBqwusQDUEtGgtcKOH4LQlbalAqObZiuw1JybshJQWJEDVmJKbn92--BHqzhsjm002HXafSlueJFLkIorPqI3_9CDT8GNdiOlQMpcVIX4BGxGZq8</recordid><startdate>20230104</startdate><enddate>20230104</enddate><creator>Cheng, Pujia</creator><creator>Lv, Wenjing</creator><creator>Shi, Zhili</creator><creator>Zhan, Kaidong</creator><creator>Liu, Yaqi</creator><creator>Quinn, Qiao</creator><creator>Wu, Fan</creator><general>Royal Society of Chemistry</general><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope><scope>7X8</scope></search><sort><creationdate>20230104</creationdate><title>Charge transport dynamics of a C6H4NH2CuBr2I/TiO2 heterojunction in aqueous solution under reverse bias</title><author>Cheng, Pujia ; Lv, Wenjing ; Shi, Zhili ; Zhan, Kaidong ; Liu, Yaqi ; Quinn, Qiao ; Wu, Fan</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-p216t-381424ed9cc0da8e70ea4eecedd3d10303a9ad860caffb3e8a22c89307d350e93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Aqueous solutions</topic><topic>Bias</topic><topic>Charge efficiency</topic><topic>Charge transfer</topic><topic>Charge transport</topic><topic>Diffusion length</topic><topic>Electric fields</topic><topic>Electron transfer</topic><topic>Heterojunctions</topic><topic>Photoelectric effect</topic><topic>Photoelectric emission</topic><topic>Titanium dioxide</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Cheng, Pujia</creatorcontrib><creatorcontrib>Lv, Wenjing</creatorcontrib><creatorcontrib>Shi, Zhili</creatorcontrib><creatorcontrib>Zhan, Kaidong</creatorcontrib><creatorcontrib>Liu, Yaqi</creatorcontrib><creatorcontrib>Quinn, Qiao</creatorcontrib><creatorcontrib>Wu, Fan</creatorcontrib><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><jtitle>Physical chemistry chemical physics : PCCP</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Cheng, Pujia</au><au>Lv, Wenjing</au><au>Shi, Zhili</au><au>Zhan, Kaidong</au><au>Liu, Yaqi</au><au>Quinn, Qiao</au><au>Wu, Fan</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Charge transport dynamics of a C6H4NH2CuBr2I/TiO2 heterojunction in aqueous solution under reverse bias</atitle><jtitle>Physical chemistry chemical physics : PCCP</jtitle><date>2023-01-04</date><risdate>2023</risdate><volume>25</volume><issue>2</issue><spage>932</spage><epage>935</epage><pages>932-935</pages><issn>1463-9076</issn><eissn>1463-9084</eissn><abstract>The photocurrent output of the C6H4NH2CuBr2I/TiO2 heterojunction photoelectrode in an aqueous solution is super stable even after 30 000 s. 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| ispartof | Physical chemistry chemical physics : PCCP, 2023-01, Vol.25 (2), p.932-935 |
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| source | Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection |
| subjects | Aqueous solutions Bias Charge efficiency Charge transfer Charge transport Diffusion length Electric fields Electron transfer Heterojunctions Photoelectric effect Photoelectric emission Titanium dioxide |
| title | Charge transport dynamics of a C6H4NH2CuBr2I/TiO2 heterojunction in aqueous solution under reverse bias |
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