Anthracene derivatives as broadband nonlinear optical materials: nonlinear absorption and excited-state dynamics analysis

Abstract

Expanding the π-bridge to adjust the molecular planarity via increasing the amount of ethylene can modulate the nonlinear optical response.

Isomeric Nonfullerene Acceptors: Planar Conformation Leading to a Higher Efficiency

“…Furthermore, HPT-4F devices revealed a stronger photoresponse, higher and more balanced charge mobilities, and suppressed bimolecular recombination. The results coincided well with the previous finding where NCLs were helpful in maintaining molecular planar conformation and could lead to better device performance. , …”

“…The results coincided well with the previous finding where NCLs were helpful in maintaining molecular planar conformation and could lead to better device performance. 49 THP-4F shows small black square flakes, and HPT-4F is a black fine powder. THP-4F exhibits good solubility in common organic solvents, and HPT-4F can be dissolved thoroughly with stirring or heating.…”

Highly broadband NLO response of acceptor–donor–acceptor materials with a planar conformation

“…The lowerenergy peak, resulting from the highest occupied molecular orbital (HOMO) to lowest unoccupied molecular orbital (LUMO) transition, has obviously redshifted (140 nm) for O-IDTBR and EH-IDTBR, which is due to their more electron-rich core as well as a more planar molecular structure. 17,18 The emission peaks of IDFBR, O-IDTBR and EH-IDTBR locate at 637 nm, 745 nm and 738 nm in CH2Cl2 solution when the excited wavelength is maximum absorption wavelength, respectively. Pronounced positive solvatochromic effect is observed in different polarity solvents ( Figure S1).…”

D–π–A type conjugated indandione derivatives: ultrafast broadband nonlinear absorption responses and transient dynamics

“…To further analyze the ultrafast dynamics of the two compounds, global and target analysis is employed to extract several relaxing processes from the TAS based on the above discussions, 11,[35][36][37][38] and the results are listed in Table 1. For INB3, ultrafast absorption is established within a pulse duration aer excitation, which is beyond the instrument response time (0.25 ps).…”