Figure 4. a) AVT (black lines) and negative-related J SC (red lines) for a 6 nm thick gold device. The effect of including a 100 nm LiF capping layer is illustrated (dashed lines). Such a capping layer modifies the field distribution inside the device, which affects the average reflected sunlight. Reproduced with permission. [60] Copyright 2014, Royal Society of Chemistry. b) Device architecture of the cells with conducting polymer PEDOT:PSS as the top electrode. Reproduced with permission. [64] Copyright 2016, American Chemical Society. c) Schematics of possible incident light paths within PSCs with the textured substrate. Reproduced with permission. [68] Copyright 2017, Elsevier B.V. All rights reserved. d) CIE1960 color space used to calculate CRI with test color samples (TCS01-TCS08) and PV devices 1-8. Comparison of objects illuminated by high and low CRI light source (left): under low CRI conditions. CIELAB color space (right): the dashed box illustrates the region of acceptable tinting for many mass-market architectural glass products. Reproduced with permission. [69] Copyright 2019, Elsevier Inc. e) Photographs of 3D TiO 2 /MAPb(I 1−x Br x ) 3 bilayer nanocomposites on FTO glass substrates. Reproduced with permission. [26] Copyright 2013, American Chemical Society. f) Color coordinates of the devices (device structure: FTO/t-TiO 2 /perovskite) under AM1.5 illumination on the CIE xy1931 chromaticity diagram and the enlarged central region. Reproduced with permission. [71]