Enhanced 1.54 μm luminescence of a perfluorinated erbium complex sensitized by perfluorinated Pt(ii) and Zn(ii) phthalocyanines with 980 nm emission

Abstract

Metallophthalocyanines with ∼980 nm emission show sensitization effects on an erbium complex. A long lifetime of 1.05 ms, a PLQY of 13%, Er3+ 1.5 μm emission enhancement of 81 times are obtained in the perfluorinated organic erbium co-doped system.

High-Sensitivity Green Photodetectors Using Subphthalocyanine Derivatives as Photoactive Donors

“…However, the densities of low-occupied orbitals are mainly dispersed at both the C and N atoms of the 14π-electron system, leaving a benzene ring associated with the isoindole unit with rarely orbital densities. The notable rearrangement of electronic density shows a definite intramolecular charge transfer feature for all the derivatives . The charge is mainly transferred from the benzene ring (circled with a blue dash line) associated with the isoindole unit to the SubPc core (circled with a purple dash line), as shown in Figure b.…”

“…The notable rearrangement of electronic density shows a definite intramolecular charge transfer feature for all the derivatives. 31 The charge is mainly transferred from the benzene ring (circled with a blue dash line) associated with the isoindole unit to the SubPc core (circled with a purple dash line), as shown in Figure 4b. The transferred electrons between the two intramolecular fragments of SubPc 3a−3d calculated using MultiWin software are 0.12891e, 0.11504 e, 0.11288 e, and 0.11048 e, respectively, which is consistent with their charge transfer abilities confirmed by the Lippert−Mataga equation.…”

BODIPY Dimers with a Fused and Coplanar Structure: Photophysical Comparison, Low Threshold for Amplified Spontaneous Emission, and Deep-Red Bio-Imaging/Photodynamic Therapy Application

“…It is assumed that the vibration, relaxation, and distortion of alkyl groups should be responsible for the energy loss in the excited state. Some literatures have mentioned a possible way to substitute −C–H with −C–F, so that the energy loss caused by the vibration, relaxation, and distortion of alkyl groups can be decreased …”

Organic Holmium(III) Complexes as a Potential Bright Emitter in Thin Films

“…Despite some sensitization schemes using other lanthanide ions to excite Ho 3+ indirectly or Tm 3+ ions, the enhancement of the emission intensity is still trivial with a small factor of <10. − In this context, organic sensitized lanthanide materials provide a possible solution. In these systems, a light-harvesting organic chromophore efficiently sensitizes nearby lanthanide ions due to the coupling between organic excitons and lanthanide energy levels. − However, the organics commonly have high-energy vibration bonds, including C–H, O–H, and N–H bonds, and they quench the lanthanide emission severely. , The quenching effect becomes more challenging to eliminate when the lanthanide emission extends to a low energy region ( e.g ., long NIR wavelengths) because of the higher coupling grade of the vibration energy and the lanthanide transition energy. For example, measuring the 1.5 μm emission brightness of most organic erbium materials is challenging.…”

“…In these systems, a light-harvesting organic chromophore efficiently sensitizes nearby lanthanide ions due to the coupling between organic excitons and lanthanide energy levels. 17 − 20 However, the organics commonly have high-energy vibration bonds, including C–H, O–H, and N–H bonds, and they quench the lanthanide emission severely. 21 , 22 The quenching effect becomes more challenging to eliminate when the lanthanide emission extends to a low energy region ( e.g ., long NIR wavelengths) because of the higher coupling grade of the vibration energy and the lanthanide transition energy.…”