Lateral Structured Phototransistor Based on Mesoscopic Graphene/Perovskite Heterojunctions
Due to their outstanding optical properties and superior charge carrier mobilities, organometal halide perovskites have been widely investigated in photodetection and solar cell areas. In perovskites photodetection devices, their high optical absorption and excellent quantum efficiency contribute to...
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| Veröffentlicht in: | Nanomaterials (Basel, Switzerland) Switzerland), 2021-03, Vol.11 (3), p.641 |
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| creator | Zhou, Dahua Yu, Leyong Zhu, Peng Zhao, Hongquan Feng, Shuanglong Shen, Jun |
| description | Due to their outstanding optical properties and superior charge carrier mobilities, organometal halide perovskites have been widely investigated in photodetection and solar cell areas. In perovskites photodetection devices, their high optical absorption and excellent quantum efficiency contribute to the responsivity, even the specific detectivity. In this work, we developed a lateral phototransistor based on mesoscopic graphene/perovskite heterojunctions. Graphene nanowall shows a porous structure, and the spaces between graphene nanowall are much appropriated for perovskite crystalline to mount in. Hot carriers are excited in perovskite, which is followed by the holes' transfer to the graphene layer through the interfacial efficiently. Therefore, graphene plays the role of holes' collecting material and carriers' transporting channel. This charge transfer process is also verified by the luminescence spectra. We used the hybrid film to build phototransistor, which performed a high responsivity and specific detectivity of 2.0 × 10
A/W and 7.2 × 10
Jones, respectively. To understand the photoconductive mechanism, the perovskite's passivation and the graphene photogating effect are proposed to contribute to the device's performance. This study provides new routes for the application of perovskite film in photodetection. |
| doi_str_mv | 10.3390/nano11030641 |
| format | Article |
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A/W and 7.2 × 10
Jones, respectively. To understand the photoconductive mechanism, the perovskite's passivation and the graphene photogating effect are proposed to contribute to the device's performance. This study provides new routes for the application of perovskite film in photodetection.</description><identifier>ISSN: 2079-4991</identifier><identifier>EISSN: 2079-4991</identifier><identifier>DOI: 10.3390/nano11030641</identifier><identifier>PMID: 33807641</identifier><language>eng</language><publisher>Switzerland: MDPI AG</publisher><subject>Annealing ; Charge transfer ; Current carriers ; Electrodes ; Graphene ; graphene nanowalls ; Heterojunctions ; Lasers ; Luminescence quenching ; Nanowires ; Optical properties ; Perovskites ; perovskites crystal ; phototransistor ; Photovoltaic cells ; Quantum dots ; Quantum efficiency ; Radio frequency plasma ; Scanning electron microscopy ; Solar cells</subject><ispartof>Nanomaterials (Basel, Switzerland), 2021-03, Vol.11 (3), p.641</ispartof><rights>2021. This work is licensed under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>2021 by the authors. 2021</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c478t-c85a28aa8e6ac54751fb882a03662379646dae29e41c14a1d189e10ccfe98a553</citedby><cites>FETCH-LOGICAL-c478t-c85a28aa8e6ac54751fb882a03662379646dae29e41c14a1d189e10ccfe98a553</cites><orcidid>0000-0002-9764-8529</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC8000990/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC8000990/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,723,776,780,860,881,2096,27901,27902,53766,53768</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/33807641$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Zhou, Dahua</creatorcontrib><creatorcontrib>Yu, Leyong</creatorcontrib><creatorcontrib>Zhu, Peng</creatorcontrib><creatorcontrib>Zhao, Hongquan</creatorcontrib><creatorcontrib>Feng, Shuanglong</creatorcontrib><creatorcontrib>Shen, Jun</creatorcontrib><title>Lateral Structured Phototransistor Based on Mesoscopic Graphene/Perovskite Heterojunctions</title><title>Nanomaterials (Basel, Switzerland)</title><addtitle>Nanomaterials (Basel)</addtitle><description>Due to their outstanding optical properties and superior charge carrier mobilities, organometal halide perovskites have been widely investigated in photodetection and solar cell areas. In perovskites photodetection devices, their high optical absorption and excellent quantum efficiency contribute to the responsivity, even the specific detectivity. In this work, we developed a lateral phototransistor based on mesoscopic graphene/perovskite heterojunctions. Graphene nanowall shows a porous structure, and the spaces between graphene nanowall are much appropriated for perovskite crystalline to mount in. Hot carriers are excited in perovskite, which is followed by the holes' transfer to the graphene layer through the interfacial efficiently. Therefore, graphene plays the role of holes' collecting material and carriers' transporting channel. This charge transfer process is also verified by the luminescence spectra. We used the hybrid film to build phototransistor, which performed a high responsivity and specific detectivity of 2.0 × 10
A/W and 7.2 × 10
Jones, respectively. To understand the photoconductive mechanism, the perovskite's passivation and the graphene photogating effect are proposed to contribute to the device's performance. 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In perovskites photodetection devices, their high optical absorption and excellent quantum efficiency contribute to the responsivity, even the specific detectivity. In this work, we developed a lateral phototransistor based on mesoscopic graphene/perovskite heterojunctions. Graphene nanowall shows a porous structure, and the spaces between graphene nanowall are much appropriated for perovskite crystalline to mount in. Hot carriers are excited in perovskite, which is followed by the holes' transfer to the graphene layer through the interfacial efficiently. Therefore, graphene plays the role of holes' collecting material and carriers' transporting channel. This charge transfer process is also verified by the luminescence spectra. We used the hybrid film to build phototransistor, which performed a high responsivity and specific detectivity of 2.0 × 10
A/W and 7.2 × 10
Jones, respectively. To understand the photoconductive mechanism, the perovskite's passivation and the graphene photogating effect are proposed to contribute to the device's performance. This study provides new routes for the application of perovskite film in photodetection.</abstract><cop>Switzerland</cop><pub>MDPI AG</pub><pmid>33807641</pmid><doi>10.3390/nano11030641</doi><orcidid>https://orcid.org/0000-0002-9764-8529</orcidid><oa>free_for_read</oa></addata></record> |
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| source | MDPI - Multidisciplinary Digital Publishing Institute; DOAJ Directory of Open Access Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; PubMed Central; PubMed Central Open Access |
| subjects | Annealing Charge transfer Current carriers Electrodes Graphene graphene nanowalls Heterojunctions Lasers Luminescence quenching Nanowires Optical properties Perovskites perovskites crystal phototransistor Photovoltaic cells Quantum dots Quantum efficiency Radio frequency plasma Scanning electron microscopy Solar cells |
| title | Lateral Structured Phototransistor Based on Mesoscopic Graphene/Perovskite Heterojunctions |
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