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Fast P3HT Exciton Dissociation and Absorption Enhancement of Organic Solar Cells by PEG‐Functionalized Graphene Quantum Dots
Author(s) -
Novak Travis G.,
Kim Jungmo,
Song Sung Ho,
Jun Gwang Hoon,
Kim Hyojung,
Jeong Mun Seok,
Jeon Seokwoo
Publication year - 2016
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201503108
Subject(s) - quantum dot , graphene , dissociation (chemistry) , exciton , materials science , peg ratio , organic solar cell , photochemistry , absorption (acoustics) , nanotechnology , chemical physics , optoelectronics , chemistry , organic chemistry , polymer , quantum mechanics , physics , finance , economics , composite material
PEG‐functionalized graphene quantum dots (GQDs) are shown to promote fast exciton dissociation in organic solar cells. Short‐chain PEG promotes the most favorable interaction with other organic layers, and the overall efficiency is improved by 36% when compared to the reference devices. The mechanism of enhancement is shown to be increased absorption due to fewer charges remaining in the bound state.