Fig. 4: Photonic structure control of PR.
From: The role of photon recycling in perovskite light-emitting diodes
a A proposed LED architecture consisting of small area electrodes and a large area film, having a reflecting mirror at the bottom. b Calculated maximum EQE (IQE = 100%) as a function of electrode width in the proposed systems having PR with back mirror, PR without back mirror (only front re-emission is collected) and no film surrounded (PR only occurs inside the pixel). The device structure in the electrode-covered area was assumed to be same as the one for Fig. 3 (with a 50 nm-thick PEA2Csn-1PbnBr3n+1 perovskite). c–e Examples of light property modification using c 1D metal nanogrid for polarisation d microstructure for angle confinement and e DBR for spectrum control.
