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Granum-Like Stacking Structures with TiO2-Graphene Nanosheets for Improving Photo-electric Conversion
Alternative TitleSmall
Yang, Nailiang1,2,3; Zhang, Yu1; Halpert, Jonathan E.2; Zhai, Jin1; Wang, Dan2; Jiang, Lei1
2012-06-11
Source PublicationSMALL
ISSN1613-6810
Volume8Issue:11Pages:1762-1770
AbstractSolar energy is commonly considered to be one of the most important forms of future energy production. This is due to its ability to generate essentially free power, after installation, with low environmental impact. Green plants, meanwhile, exhibit a process for light-to-charge conversion that provides a useful model for using solar radiation efficiently. Granum, the core organ in photosynthesis consists of a stack of similar to 10100 thylakoids containing pigments and electrons acceptors. Imitating the structure and function of granum, stacked structures are fabricated with TiO2/graphene nanosheets as the thylakoids unit, and their photo-electric effect is studied by varying the number of layers present in the film. The photo-electric response of the graphene composites are found to be 20 times higher than that of pure TiO2 in films with 25 units stacked. Importantly, the cathodic photocurrent changes to anodic photocurrent as the thickness increases, an important feature of efficient solar cells which is often ignored. Here graphene is proposed to perform similarly to the b6f complex in granum, by separating charges and transporting electrons through the stacked film. Using this innovation, stacked TiO2/graphene structures are now able to significantly increase photoanode thickness in solar cells without losing the ability to conduct electrons.; Solar energy is commonly considered to be one of the most important forms of future energy production. This is due to its ability to generate essentially free power, after installation, with low environmental impact. Green plants, meanwhile, exhibit a process for light-to-charge conversion that provides a useful model for using solar radiation efficiently. Granum, the core organ in photosynthesis consists of a stack of similar to 10100 thylakoids containing pigments and electrons acceptors. Imitating the structure and function of granum, stacked structures are fabricated with TiO2/graphene nanosheets as the thylakoids unit, and their photo-electric effect is studied by varying the number of layers present in the film. The photo-electric response of the graphene composites are found to be 20 times higher than that of pure TiO2 in films with 25 units stacked. Importantly, the cathodic photocurrent changes to anodic photocurrent as the thickness increases, an important feature of efficient solar cells which is often ignored. Here graphene is proposed to perform similarly to the b6f complex in granum, by separating charges and transporting electrons through the stacked film. Using this innovation, stacked TiO2/graphene structures are now able to significantly increase photoanode thickness in solar cells without losing the ability to conduct electrons.
KeywordArtificial Granum Stacked Structures Tio2 Graphene Photo-electric Conversion Charge Transport
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1002/smll.201200079
URL查看原文
Indexed BySCI
Language英语
WOS KeywordSENSITIZED SOLAR-CELLS ; PHOTOCATALYTIC REDUCTION ; ELECTRON-TRANSPORT ; CARBON NANOTUBES ; GRAPHENE SHEETS ; BACK-REACTION ; FILMS ; OXIDE ; FUNCTIONALIZATION ; GRAPHITE
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS IDWOS:000304817700017
Citation statistics
Cited Times:35[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6355
Collection研究所(批量导入)
Affiliation1.Beihang Univ, Sch Chem & Environm, Minist Educ, Key Lab Bioinspired Smart Interfacial Sci & Techn, Beijing 100191, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Yang, Nailiang,Zhang, Yu,Halpert, Jonathan E.,et al. Granum-Like Stacking Structures with TiO2-Graphene Nanosheets for Improving Photo-electric Conversion[J]. SMALL,2012,8(11):1762-1770.
APA Yang, Nailiang,Zhang, Yu,Halpert, Jonathan E.,Zhai, Jin,Wang, Dan,&Jiang, Lei.(2012).Granum-Like Stacking Structures with TiO2-Graphene Nanosheets for Improving Photo-electric Conversion.SMALL,8(11),1762-1770.
MLA Yang, Nailiang,et al."Granum-Like Stacking Structures with TiO2-Graphene Nanosheets for Improving Photo-electric Conversion".SMALL 8.11(2012):1762-1770.
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