Fig. 2: Analysis of time-resolved photoluminescence.

a Pt(fprpz)2 monitored at 750 nm, b BTP-eC9 monitored at 1000 nm, c We define “front” as the incident light on the surface of BTP-eC9 and “rear” as the incident light on the quartz surface. d Pt(fprpz)2/BTP-eC9 spin-coated film monitored at 750 nm, e Pt(fprpz)2/BTP-eC9 spin-coated film monitored at 1000 nm f Pt(fprpz)2/BTP-eC9 stamped film monitored at 750 nm and g Pt(fprpz)2/BTP-eC9 stamped film monitored at 1000 nm. The statistical confidence factor (χ2) for the lifetime fit is <1.3. The uncertainty of the fitted lifetime value is ±1.2 ns.