Table 2 Electroluminescence characteristics of the devices.

DeviceEmitterVon* (V)Maximum
efficiency†
Efficiency at
1000 cd m−2
ηout§ (%)ηout × ΦPL|| (%)λEL¶ (nm)CIE¶ (x, y)
CE (cd A−1), PE
(lm W−1), and
EQE (%)
CE (cd A−1), PE
(lm W−1), and
EQE (%)
APXZPM3.098.4, 103.5, 29.568.5, 38.9, 20.534.034.0528(0.33, 0.58)
BPXZPyPM3.0113.5, 118.9, 33.978.6, 44.6, 23.539.139.1528(0.33, 0.58)
CPXZTAZPM3.0101.3, 106.1, 30.162.6, 29.5, 18.639.736.9528(0.33, 0.58)

*Turn-on voltage at 1 cd m−2.

†Maximum efficiencies of CE (cd A−1), PE (lm W−1), and EQE (%). The error for EQE is ±0.4%, which is obtained from five devices.

‡Electroluminescence efficiencies recorded at 1000 cd m−2.

§Calculated optical out-coupling efficiency.

||Theoretical external quantum efficiencies.

¶Electroluminescence peaks and CIE 1931 coordinates recorded at 6 V.