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Organic Heptamethine Salts for Photovoltaics and Detectors with Near‐Infrared Photoresponse up to 1600 nm
Author(s) -
Young Margaret,
SuddardBangsund John,
Patrick Tyler J.,
Pajares Natalia,
Traverse Christopher J.,
Barr Miles C.,
Lunt Sophia Y.,
Lunt Richard R.
Publication year - 2016
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201600102
Subject(s) - materials science , photodetector , optoelectronics , infrared , band gap , photovoltaics , cationic polymerization , organic solar cell , ion , near infrared spectroscopy , detector , exciton , photovoltaic system , optics , chemistry , physics , electrical engineering , composite material , polymer , organic chemistry , quantum mechanics , polymer chemistry , engineering
A new series of cationic heptamethine salts with selective deep near‐infrared photoresponse are demonstrated having photoresponse cutoffs between λ = 1400 and 1600 nm. Anion exchange and alloying allows for fine energy level tuning to increase open‐circuit voltages, photodetector detectivities, and provide insight into the exciton binding energies of these very small bandgap organic salts.