CPW-LEDs CQS CRI LO energy harvesting (EH) luminous efficacy outage probability red-emitting phosphor wireless energy harvesting (EH) D-CCT IPW-LEDs Identification Inverted pendulum Mie-scattering theory Non-linear system Real interpolation method RIM SrBaSiO4:Eu2+ WLEDs a distributed parameter system approximation color rendering index color uniformity dual-layer phosphor ergodic capacity full-duplex full-duplex (FD) half-duplex half-duplex (HD) hybrid decode-amplify and forward protocol (HDAF) intercept probability (SP) lambert-beer law monte carlo simulation optical properties optical quality outage probability (OT) real interpolation method red phosphor relaying network throughput