Al-TiO₂ composite-modified single-layer graphene as an efficient transparent cathode for organic solar cells.
Identifieur interne : 000890 ( Main/Exploration ); précédent : 000889; suivant : 000891Al-TiO₂ composite-modified single-layer graphene as an efficient transparent cathode for organic solar cells.
Auteurs : RBID : pubmed:23327464Abstract
While there are challenges in tuning the properties of graphene (surface wettability, work function alignment, and carrier transport) for realizing an efficient graphene cathode in organic solar cells (OSCs), we propose and demonstrate using an Al-TiO₂ composite to modify single-layer graphene as an efficient cathode for OSCs. To unveil the contributions of the composite in addressing the aforementioned challenges, the evaporated aluminum nanoclusters in the composite benefit the graphene cathode by simultaneously achieving two roles of improving its surface wettability for subsequent TiO₂ deposition and reducing its work function to offer better energy alignment. To address challenges related to charge transport, solution-processed TiO₂ with excellent electron transport can offer charge extraction enhancement to the graphene cathode, which is essential to efficient devices. However, it is a well-known issue for methods such as spin-coating to produce uniform films on the initially hydrophobic graphene, even with improved wettability. The undesirable morphology of TiO₂ by such methods considerably inhibits its effectiveness in enhancing charge extraction. We propose a self-assembly method to deposit the solution-processed TiO₂ on the Al-covered graphene for forming the Al-TiO₂ composite. Compared with spin-coating, the self-assembly method is found to achieve more uniform coating on the graphene surface, with highly controllable thickness. Consequently, the graphene cathode modified with the Al-TiO₂ composite in inverted OSCs gives rise to enhanced power conversion efficiency of 2.58%, which is 2-fold of the previously best reported efficiency (1.27%) for graphene cathode OSCs, reaching ∼75% performance of control devices using indium tin oxide.
DOI: 10.1021/nn3058399
PubMed: 23327464
Links toward previous steps (curation, corpus...)
Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Al-TiO₂ composite-modified single-layer graphene as an efficient transparent cathode for organic solar cells.</title><author><name sortKey="Zhang, Di" uniqKey="Zhang D">Di Zhang</name><affiliation wicri:level="1"><nlm:affiliation>Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong.</nlm:affiliation><country xml:lang="fr">Hong Kong</country><wicri:regionArea>Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road</wicri:regionArea></affiliation></author><author><name sortKey="Xie, Fengxian" uniqKey="Xie F">Fengxian Xie</name></author><author><name sortKey="Lin, Peng" uniqKey="Lin P">Peng Lin</name></author><author><name sortKey="Choy, Wallace C H" uniqKey="Choy W">Wallace C H Choy</name></author></titleStmt><publicationStmt><date when="2013">2013</date><idno type="doi">10.1021/nn3058399</idno><idno type="RBID">pubmed:23327464</idno><idno type="pmid">23327464</idno><idno type="wicri:Area/Main/Corpus">000846</idno><idno type="wicri:Area/Main/Curation">000846</idno><idno type="wicri:Area/Main/Exploration">000890</idno></publicationStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">While there are challenges in tuning the properties of graphene (surface wettability, work function alignment, and carrier transport) for realizing an efficient graphene cathode in organic solar cells (OSCs), we propose and demonstrate using an Al-TiO₂ composite to modify single-layer graphene as an efficient cathode for OSCs. To unveil the contributions of the composite in addressing the aforementioned challenges, the evaporated aluminum nanoclusters in the composite benefit the graphene cathode by simultaneously achieving two roles of improving its surface wettability for subsequent TiO₂ deposition and reducing its work function to offer better energy alignment. To address challenges related to charge transport, solution-processed TiO₂ with excellent electron transport can offer charge extraction enhancement to the graphene cathode, which is essential to efficient devices. However, it is a well-known issue for methods such as spin-coating to produce uniform films on the initially hydrophobic graphene, even with improved wettability. The undesirable morphology of TiO₂ by such methods considerably inhibits its effectiveness in enhancing charge extraction. We propose a self-assembly method to deposit the solution-processed TiO₂ on the Al-covered graphene for forming the Al-TiO₂ composite. Compared with spin-coating, the self-assembly method is found to achieve more uniform coating on the graphene surface, with highly controllable thickness. Consequently, the graphene cathode modified with the Al-TiO₂ composite in inverted OSCs gives rise to enhanced power conversion efficiency of 2.58%, which is 2-fold of the previously best reported efficiency (1.27%) for graphene cathode OSCs, reaching ∼75% performance of control devices using indium tin oxide.</div></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="PubMed-not-MEDLINE"><PMID Version="1">23327464</PMID><DateCreated><Year>2013</Year><Month>02</Month><Day>27</Day></DateCreated><DateCompleted><Year>2013</Year><Month>08</Month><Day>22</Day></DateCompleted><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1936-086X</ISSN><JournalIssue CitedMedium="Internet"><Volume>7</Volume><Issue>2</Issue><PubDate><Year>2013</Year><Month>Feb</Month><Day>26</Day></PubDate></JournalIssue><Title>ACS nano</Title><ISOAbbreviation>ACS Nano</ISOAbbreviation></Journal><ArticleTitle>Al-TiO₂ composite-modified single-layer graphene as an efficient transparent cathode for organic solar cells.</ArticleTitle><Pagination><MedlinePgn>1740-7</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1021/nn3058399</ELocationID><Abstract><AbstractText>While there are challenges in tuning the properties of graphene (surface wettability, work function alignment, and carrier transport) for realizing an efficient graphene cathode in organic solar cells (OSCs), we propose and demonstrate using an Al-TiO₂ composite to modify single-layer graphene as an efficient cathode for OSCs. To unveil the contributions of the composite in addressing the aforementioned challenges, the evaporated aluminum nanoclusters in the composite benefit the graphene cathode by simultaneously achieving two roles of improving its surface wettability for subsequent TiO₂ deposition and reducing its work function to offer better energy alignment. To address challenges related to charge transport, solution-processed TiO₂ with excellent electron transport can offer charge extraction enhancement to the graphene cathode, which is essential to efficient devices. However, it is a well-known issue for methods such as spin-coating to produce uniform films on the initially hydrophobic graphene, even with improved wettability. The undesirable morphology of TiO₂ by such methods considerably inhibits its effectiveness in enhancing charge extraction. We propose a self-assembly method to deposit the solution-processed TiO₂ on the Al-covered graphene for forming the Al-TiO₂ composite. Compared with spin-coating, the self-assembly method is found to achieve more uniform coating on the graphene surface, with highly controllable thickness. Consequently, the graphene cathode modified with the Al-TiO₂ composite in inverted OSCs gives rise to enhanced power conversion efficiency of 2.58%, which is 2-fold of the previously best reported efficiency (1.27%) for graphene cathode OSCs, reaching ∼75% performance of control devices using indium tin oxide.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Zhang</LastName><ForeName>Di</ForeName><Initials>D</Initials><Affiliation>Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong.</Affiliation></Author><Author ValidYN="Y"><LastName>Xie</LastName><ForeName>Fengxian</ForeName><Initials>F</Initials></Author><Author ValidYN="Y"><LastName>Lin</LastName><ForeName>Peng</ForeName><Initials>P</Initials></Author><Author ValidYN="Y"><LastName>Choy</LastName><ForeName>Wallace C H</ForeName><Initials>WC</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType>Journal Article</PublicationType><PublicationType>Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2013</Year><Month>01</Month><Day>23</Day></ArticleDate></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>ACS Nano</MedlineTA><NlmUniqueID>101313589</NlmUniqueID><ISSNLinking>1936-0851</ISSNLinking></MedlineJournalInfo></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="aheadofprint"><Year>2013</Year><Month>1</Month><Day>23</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2013</Year><Month>1</Month><Day>19</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2013</Year><Month>1</Month><Day>19</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2013</Year><Month>1</Month><Day>19</Day><Hour>6</Hour><Minute>1</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="doi">10.1021/nn3058399</ArticleId><ArticleId IdType="pubmed">23327464</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=IndiumV2/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000890 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 000890 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= *** parameter Area/wikiCode missing ***
|area= IndiumV2
|flux= Main
|étape= Exploration
|type= RBID
|clé= pubmed:23327464
|texte= Al-TiO₂ composite-modified single-layer graphene as an efficient transparent cathode for organic solar cells.
}}
Pour générer des pages wiki
HfdIndexSelect -h $EXPLOR_AREA/Data/Main/Exploration/RBID.i -Sk "pubmed:23327464" \
| HfdSelect -Kh $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd \
| NlmPubMed2Wicri -a IndiumV2
| This area was generated with Dilib version V0.5.76. |  |