dc.contributor.author | Osedach, Timothy Paul | |
dc.contributor.author | Geyer, Scott Mitchell | |
dc.contributor.author | Ho, John C. | |
dc.contributor.author | Arango, Alexi C. | |
dc.contributor.author | Bawendi, Moungi G. | |
dc.contributor.author | Bulovic, Vladimir | |
dc.date.accessioned | 2010-09-17T18:11:39Z | |
dc.date.available | 2010-09-17T18:11:39Z | |
dc.date.issued | 2009-01 | |
dc.date.submitted | 2008-10 | |
dc.identifier.issn | 0003-6951 | |
dc.identifier.issn | 1077-3118 | |
dc.identifier.uri | http://hdl.handle.net/1721.1/58589 | |
dc.description.abstract | We demonstrate a heterojunction photodetector of lateral geometry that utilizes an evaporated film of the hole-transporting molecular material N,N′-bis(3-methylphenyl)-N,N′-bis(phenyl)-9,9-spirobifluorene (spiro-TPD) as a charge transport layer and that is sensitized across visible wavelengths by a thin film of colloidal CdSe nanocrystal quantum dots (QDs). High photon-to-electron quantum conversion efficiencies are obtained at room temperature as a result of photoconductive gain. With an electric field of 3.0×10[superscript 5] V/cm applied across the electrodes, we measure the external quantum efficiency at the first QD absorption peak (at wavelength λ = 590 nm) to be 13%, corresponding to an internal quantum efficiency of approximately 80%. The operating mechanism of these devices is discussed, noting that the optical response is dominated by the QD absorption spectrum while the charge transport nearly exclusively takes place in the spiro-TPD. | en_US |
dc.description.sponsorship | National Science Foundation (U.S.) (Graduate Research Fellowship) | en_US |
dc.description.sponsorship | Martin Family Society of Fellows for Sustainability | en_US |
dc.description.sponsorship | Corning Foundation | en_US |
dc.description.sponsorship | National Science Foundation (U.S.). Materials Research Science and Engineering Centers (Program) (DMR-0213282) | en_US |
dc.description.sponsorship | Institute for Soldier Nanotechnologies (W911NF-07-D-0004) | en_US |
dc.language.iso | en_US | |
dc.publisher | American Institute of Physics | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1063/1.3075577 | en_US |
dc.rights | Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. | en_US |
dc.source | MIT Web Domain | en_US |
dc.subject | visible spectra | en_US |
dc.subject | semiconductor thin films | en_US |
dc.subject | semiconductor quantum dots | en_US |
dc.subject | semiconductor heterojunctions | en_US |
dc.subject | photodetectors | en_US |
dc.subject | photoconductivity | en_US |
dc.subject | organic compounds | en_US |
dc.subject | nanostructured materials | en_US |
dc.subject | II-VI semiconductors | en_US |
dc.subject | hole mobility | en_US |
dc.subject | electrodes | en_US |
dc.subject | colloids | en_US |
dc.subject | cadmium compounds | en_US |
dc.title | Lateral heterojunction photodetector consisting of molecular organic and colloidal quantum dot thin films | en_US |
dc.type | Article | en_US |
dc.identifier.citation | Osedach, Tim P. et al. “Lateral heterojunction photodetector consisting of molecular organic and colloidal quantum dot thin films.” Applied Physics Letters 94.4 (2009): 043307-3. © 2009 American Institute of Physics | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Department of Chemical Engineering | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Research Laboratory of Electronics | en_US |
dc.contributor.approver | Bawendi, Moungi G. | |
dc.contributor.mitauthor | Osedach, Timothy Paul | |
dc.contributor.mitauthor | Geyer, Scott Mitchell | |
dc.contributor.mitauthor | Ho, John C. | |
dc.contributor.mitauthor | Arango, Alexi C. | |
dc.contributor.mitauthor | Bawendi, Moungi G. | |
dc.contributor.mitauthor | Bulovic, Vladimir | |
dc.relation.journal | Applied Physics Letters | en_US |
dc.eprint.version | Final published version | en_US |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
dspace.orderedauthors | Osedach, Tim P.; Geyer, Scott M.; Ho, John C.; Arango, Alexi C.; Bawendi, Moungi G.; Bulović, Vladimir | en |
dc.identifier.orcid | https://orcid.org/0000-0003-4422-3313 | |
dc.identifier.orcid | https://orcid.org/0000-0002-0960-2580 | |
dc.identifier.orcid | https://orcid.org/0000-0003-2220-4365 | |
dspace.mitauthor.error | true | |
mit.license | PUBLISHER_POLICY | en_US |
mit.metadata.status | Complete | |