Singlet Fission in Thin Solid Films of Bis(thienyl)diketopyrrolopyrroles
ČlánekStatus neznámýpeer-reviewedpublished versionDatum publikování
2020
Vedoucí práce
Oponent
Název časopisu
Název svazku
Vydavatel
Wiley-VCH
Abstrakt
The singlet fission (SF) process discovered in bis(thienyl)diketopyrrolopyrroles (TDPPs) can boost their potential for photovoltaics (PV). The crystal structures of TDPP analogs carrying n-hexyl, n-butyl, or 2-(adamant-1-yl)ethyl substituents are similar, but contain increasingly slipped stacked neighbor molecules. The observed SF rate constants, k(SF), (7 +/- 4), (9 +/- 3) and (5.6 +/- 1.9) ns(-1) for thin films of the three compounds, respectively, are roughly equal, but the triplet quantum yields vary strongly: (120 +/- 40), (160 +/- 40) and (70 +/- 16), respectively. The recent molecular pair model reproduces the near equality of all three k(SF) at the crystal geometries and identifies all possible pair arrangements in which SF is predicted to be faster, by up to two orders of magnitude. However, it is also clear that the presently non-existent ability to predict the rates of processes competing with SF is pivotal for providing a guide for efforts to optimize the materials for PV.
Rozsah stran
p. 2689-2703
ISSN
2192-6506
Trvalý odkaz na tento záznam
Projekt
Zdrojový dokument
ChemPlusChem, volume 85, issue: 12
Vydavatelská verze
https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/cplu.202000623
Přístup k e-verzi
pouze v rámci univerzity
Název akce
ISBN
Studijní obor
Studijní program
Signatura tištěné verze
Umístění tištěné verze
Přístup k tištěné verzi
Klíčová slova
optical spectroscopy, photophysics, singlet fission, bis(thienyl)diketopyrrolopyrroles, optická spektroskopie, fotofyzika, štěpení singletu, bis(thienyl)diketopyrrolopyrroly