Efficient singlet fission in nanoparticles of amphipathic anthracene–tetracene dyad with broadband light harvesting ability

Nie, Xinyu; Liu, Heyuan; Wang, Weijie; Su, Pengkun; Zhou, Jun; Li, Zhi; Liu, Zhaobin; Tang, Zhaofeng; Chen, Yanli; Li, Xiyou

doi:10.1039/d1tc05316g

Cited by 2 publications

(1 citation statement)

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“…Singlet fission is one of the viable approaches to exceed the maximum solar‐to‐electric power conversion efficiency (Shockley–Queisser limit) of conventional solar cells. [ 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 ] Singlet fission is a spin‐allowed photophysical process in which a photoexcited singlet (S 1 ) state generates two triplet states (T 1 ), yielding an individual triplet yield ( φ T ) of over 100% ( Figure 1 a ). [ 40 ] Moreover, singlet fission involves a multiexciton state (triplet pair 1 (TT)) with an overall singlet‐spin multiplicity.…”

Section: Introductionmentioning

confidence: 99%

Singlet Fission‐Based High‐Resolution X‐Ray Imaging Scintillation Screens

et al. 2023

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X‐ray imaging technology is critical to numerous different walks of daily life, ranging from medical radiography and security screening all the way to high‐energy physics. Although several organic chromophores are fabricated and tested as X‐ray imaging scintillators, they generally show poor scintillation performance due to their weak X‐ray absorption cross‐section and inefficient exciton utilization efficiency. Here, a singlet fission‐based high‐performance organic X‐ray imaging scintillator with near unity exciton utilization efficiency is presented. Interestingly, it is found that the X‐ray sensitivity and imaging resolution of the singlet fission‐based scintillator are dramatically improved by an efficient energy transfer from a thermally activated delayed fluorescence (TADF) sensitizer, in which both singlet and triplet excitons can be efficiently harnessed. The fabricated singlet fission‐based scintillator exhibits a high X‐ray imaging resolution of 27.5 line pairs per millimeter (lp mm−1), which exceeds that of most commercial scintillators, demonstrating its high potential use in medical radiography and security inspection.

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