Impact of material parameters on strong exciton–photon coupling states formed in microcrystal resonators of p- and n-type thiophene/phenylene co-oligomers

Abstract

Microcrystal resonators with different orientations of thiophene/phenylene co-oligomers are prepared using a modified miniemulsion method. Strong exciton–photon coupling with Rabi splitting energy up to 1.25 eV is observed.

Observation of Size‐Dependent Optical Properties Based on Surface and Quantum Effects in Nanocrystals of 5,5′‐Bis(4‐Biphenylyl)‐2,2′‐Bithiophene

“…Q min in (b) means a relative displacement of the relaxed exciton state from the bottom of the ground state. The blue region displayed in (b, c) shows the exciton binding energy of 0.04-0.41 eV which was determined in our previous study [51]. Blue arrows indicate fluorescence transitions from the lowest excited states to the ground states.…”

“…We have recently reported the PLQY value of BP2T bulk crystals (microcrystals) to be 40% by examining the temperature dependence of the 0 − 1 emission band lifetime. [ 51 ] The equation used for analysis is as follows where τ , k f , k nr , E a , k B , and T are the spontaneous emission lifetime, radiative transition rate constant, nonradiative transition rate constant, activation energy of nonradiative transition, Boltzmann constant, and temperature, respectively. [ 33,51 ] By fitting the experimental data using Equation (), the parameters of k f , k nr , and E a were determined for the BP2T nanocrystals with an average size of 620 and 280 nm.…”

“…[ 51 ] The equation used for analysis is as follows where τ , k f , k nr , E a , k B , and T are the spontaneous emission lifetime, radiative transition rate constant, nonradiative transition rate constant, activation energy of nonradiative transition, Boltzmann constant, and temperature, respectively. [ 33,51 ] By fitting the experimental data using Equation (), the parameters of k f , k nr , and E a were determined for the BP2T nanocrystals with an average size of 620 and 280 nm. These values are presented in Table 1 .…”

“…From the EELS maps of O and Na for the , c) shows the exciton binding energy of 0.04-0.41 eV which was determined in our previous study. [51] Blue arrows indicate fluorescence transitions from the lowest excited states to the ground states. nanocrystal, it was found that the surface of the BP2T nanocrystal was densely covered by SDS.…”

“…We have recently reported the PLQY value of BP2T bulk crystals (microcrystals) to be 40% by examining the temperature dependence of the 0 À 1 emission band lifetime. [51] The equation used for analysis is as follows…”