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Diphosphane-Mediated Control of the Emissive Properties in [Cu(NHC)(P^P)] + Complexes: TADF vs Phosphorescence

Year: 2025

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide The influence of both the skeleton and substituents of the diphosphane in the photophysical properties of [Cu(NHC)(P^P)]PF 6 TADF-phosphorescent emitters is investigated [NHC = Bz-Im-2-XPy (X = H, Cl)]. The study reveals that optimization of the diphosphane structure can boost quantum yields to as high as 85% using carbenes with simple structural frameworks or substituent wings. Remarkably, the diphosphane skeleton emerges as the most influential factor for controlling the quantum yield (Φ). None of the ΔE(S 1 -T 1 ) energy gap, steric factors (buried volume percentage), or T 1 energy alone seem to govern the observed Φ. These insights reveal new avenues for achieving high-performance TADF emitters through ligand engineering.

Source: Inorganic Chemistry

DOI: 10.1021/acs.inorgchem.5c03511

Authors: Raquel Jiménez, Olga Crespo, M. Concepción Gimeno

Institutions: Universidad de Zaragoza, Instituto de Síntesis Química y Catálisis Homogénea

Language: English

Topic: Organic Light-Emitting Diodes Research

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,500