Photoluminescence and electroluminescence characterization of high-performance near-infrared emitters based on 1,5-naphthyridin-4-ol-containing heteroleptic platinum(ii) complexes

Abstract

Four 1,5-Naphthyridin-4-ol containing platinum complexes, AtFOND, AtFNND, PBSOND, and PBSNND, have been synthesized and characterized for photoluminescence (PL) and electroluminescence (EL) properties. In addition to support the aggregate/excimer formation of...

Hybrid white organic light‐emitting diodes based on platinum complex

“…In 2021, two new platinum complexes, PBSNND and AtFNND (Figure 20), were reported for their NIR emission (PL or EL) in the solid state by Chen et al 44 Similar to previous FPtmND , FPtOPhND , FPtdmaND , and FPtmorND , both PBSNND and AtFNND exhibit the concentration dependent emission in solution or in varied host materials (Figure 20). In diluted solution, PBSNND and AtFNND are golden yellow and yellowish green, respectively.…”

“…Reproduced with permission. 44 Copyright 2021, The Royal Society of Chemistry configuration of Device VIII-XV, the voltageindependent EL spectra have been also observed for Device XII-XV (Figure 16), although their white EL performances were inferior to those of Device VIII-XV (Table 1) regarding either maximum EQE, CIE x,y . or CRI.…”

“…For the first time, the EQE of platinum‐complex based hybrid WOLED has surpassed 12%. The record high EQE may be attributed to a high PL quantum yields (53%) of PBSNND in the solid state 44 . However, the device shows a warm white, CIE x,y (0.41, 0.31), instead of a pure white color.…”

“…Having a less contribution from the less efficient deep red/NIR EL, the EQE of Device XX , reaches unprecedented high 13.7% with CRI up to 85, which are both better than those of Device XIX . The new record high EQE can be attributed to a high PL quantum yields (58%) of AtFNND in the solid state 44 . Nevertheless, the near pure white EL spectra of Device XX are similarly voltage dependent as Device XIX (Figure 23).…”

“…The solution (in CH 2 Cl 2 ) and thin film PL spectra of PBSNND and AtFNND . Reproduced with permission 44 . Copyright 2021, The Royal Society of Chemistry…”