Effect of chips surface morphology on optical performance of remote and conformal phosphor-converted light-emitting diodes
In this paper, we use optical simulations to study the influence of chips surface morphology on remote phosphor-converted light-emitting diodes (rpcLEDs) and conformal phosphor-converted light-emitting diodes (cpcLEDs), respectively. Their radiant efficacy, luminous efficacy, spectra and correlated color temperature (CCT) are given and discussed. Results show that the rough surface more contributes to the light extraction of rpcLEDs compared with that of cpcLEDs; moreover, rpcLEDs have a more excellent CCT consistency when using vertical LED chips with different surface morphology. It can provide a new perspective to understand the differences between the remote and conformal phosphor structures.