| 초록 |
The usefulness of organic−inorganic metal halide-based perovskite solar cells (PSCs) in building-integrated photovoltaics (BIPVs) has begun to be proposed owing to their superiority in color tunability. This is because that color tuning can be easily achieved by adjusting the absorbance of the photoactive layer of PSCs. Herein, we present attractive strategy inspired by the cuticle of beetle for application in colorful PSCs, which are constructed by integrating of helicoidal reflective (iridescence) layer without adjusting the absorbance of their photoactive layers. Bandwidth of the reflective filter closely related with power conversion efficiency (PCE) of PSCs was modulated by doping non-liquid crystalline molecules to cholesteric phase. By optimizing the mixing ratio of the non-liquid crystalline molecules, we reduced full-width at half-maximum (FWHM) values of the reflective filter up to about 50 nm with minimal PCE loss. |
