In Figure 4a, the BRDF curve under the measurement conditions has a polarisation incidence with an incident wavelength of 635 nm. Ca, Cb and Cc represent the curve of the Ca, Cb and Cc devices in Figure 3e and 3f, respectively. The incident angle was fixed at 30°, 45° and 60°, and the intensity of the reflective light was measured from 10° to 80°. The results indicate that the scattering intensity of Ca is larger than Cb and Cc. In the Figures 4b and 4c, the optical transmittance spectra at low and high temperatures and the I-V curves under AM 1,5 illumination of the three devices in Figure 3e (Ca, and Cb) and 3f-Cc are shown.