N
Nadav Geva
Researcher at Massachusetts Institute of Technology
Publications - 9
Citations - 862
Nadav Geva is an academic researcher from Massachusetts Institute of Technology. The author has contributed to research in topics: Photon upconversion & Nanocrystal. The author has an hindex of 6, co-authored 9 publications receiving 671 citations.
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Journal ArticleDOI
Solid-state infrared-to-visible upconversion sensitized by colloidal nanocrystals
Mengfei Wu,Daniel N. Congreve,Mark W. Wilson,Joel Jean,Nadav Geva,Matthew Welborn,Troy Van Voorhis,Vladimir Bulovic,Moungi G. Bawendi,Marc A. Baldo +9 more
TL;DR: In this article, a solid-state thin film for infrared-to-visible upconversion that employs lead sulphide colloidal nanocrystals as a sensitizer was proposed.
Journal ArticleDOI
Energy harvesting of non-emissive triplet excitons in tetracene by emissive PbS nanocrystals
Nicholas J. Thompson,Mark W. Wilson,Daniel N. Congreve,Patrick O. Brown,Jennifer M. Scherer,Thomas S. Bischof,Mengfei Wu,Nadav Geva,Matthew Welborn,Troy Van Voorhis,Vladimir Bulovic,Moungi G. Bawendi,Marc A. Baldo +12 more
TL;DR: Direct excitonic energy transfer from 'dark' triplets in the organic semiconductor tetracene to colloidal PbS nanocrystals is demonstrated, thereby successfully harnessing molecular triplet excitons in the near infrared and may permit singlet exciton fission sensitization of conventional silicon solar cells.
Journal ArticleDOI
Speed Limit for Triplet-Exciton Transfer in Solid-State PbS Nanocrystal-Sensitized Photon Upconversion.
Lea Nienhaus,Mengfei Wu,Nadav Geva,James J. Shepherd,Mark W. Wilson,Vladimir Bulovic,Troy Van Voorhis,Marc A. Baldo,Moungi G. Bawendi +8 more
TL;DR: This work studies the transfer of excitons from colloidal lead sulfide nanocrystals to the spin-triplet state of rubrene molecules by reducing the length of the carboxylic acid ligands on the nanocrystal surface, and thinning the effective ligand shell to increase the characteristic transfer rate.
Journal ArticleDOI
Morphology of Passivating Organic Ligands around a Nanocrystal
TL;DR: Semiconductor nanocrystals are a promising class of materials for a variety of novel optoelectronic devices, since many of their properties, such as the electronic gap and conductivity, can be cont...
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Morphology of passivating organic ligands around a nanocrystal
TL;DR: In this article, the authors simulate ligand-coated CdSe nanocrystals using atomistic molecular dynamics, allowing for the resolution of novel structural details about the ligand shell.