Figure 2 | Wafer-scale high-efficiency weak-PEF LEDs. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure 2 | Wafer-scale high-efficiency weak-PEF LEDs.

Caption

Figure 2 | Wafer-scale high-efficiency weak-PEF LEDs. a, Photograph of a 4-inch weak-PEF LED wafer on the polar c-plane. b, Peak wavelength mapping of the weak-PEF LED wafer using pulse-growth modes after optimization. c, Peak wavelength variation of LEDs under different injection current densities. LED-1 and LED-2 are weak-PEF LEDs using pulse-growth modes before and after optimization, respectively. LED-3 is a conventional InGaN/GaN MQWs LED. d, Comparison of the peak EQE of LED-2 with reported weak-PEF LEDs.

Credit

Yuantao Zhang et al.

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