Semi-transparent Perovskite Solar Cells Developed by Considering Human Luminosity Function

Abstract

Semi-transparent solar cells draw a great deal of attention because their applications include, for instance, photovoltaic windows. General approach to semi-transparent cells is using thin active layers or island-type structures. Here we take human luminosity function into account, and develop solar cells that harvest photons in the wavelength regions in which human eyes are less sensitive to light. We used an organic-inorganic hybrid perovskite, which is sensitive to light particularly in the blue and deep-blue regions, and plasmonic silver nanocubes that enhance light harvesting in the red and deep-red ranges. In order to tune the plasmonic wavelength to that range, we took advantage of electrode-coupled plasmons (ECPs). We prepared non-plasmonic semi-transparent solar cells, and reduced the active layer thickness and introduced ECPs, so that the visual transparency index and power conversion efficiency of the cell were improved by 28% and 6%, respectively, of the initial values.

Semitransparent Sb2S3 thin film solar cells by ultrasonic spray pyrolysis for use in solar windows

“…The AVT was calculated as the arithmetic average of total transmittance of the glass/ITO/TiO 2 /Sb 2 S 3 stack in the 380–740 nm wavelength range by using Eq. 1 [71]:…”

Recent Progress on Advanced Optical Structures for Emerging Photovoltaics and Photodetectors

“…To realize semitransparency in OPVs and PSCs, one can manipulate the coverage, [ 35–43,161–163 ] thickness, [ 10–17,44–48,164,165 ] or bandgap of the active layer [ 2,8,9,18–24,49,50,166–168 ] or replace the opaque metal electrode with light‐transmitting media (e.g., metal nanowires, [ 44,46,51–56,169–171 ] transparent conducting oxides, [ 43,57–61,167,168,172–180 ] transparent conducting polymers, [ 40,62,63,181–184 ] graphene, [ 54,64,164,185 ] and carbon nanotube [ 65,186–188 ] ). Although the most convenient way to fabricate an ST‐PV is to decrease the thickness of the top metal electrode and, thereby, increase its transparency, [ 35,39,40,47,58,66–72,124 ] there is always a trade‐off between conductivity and transparency.…”

Charge Transport Properties of Methylammonium Lead Trihalide Hybrid Perovskite Bulk Single Crystals

“…One example that is not looked at in detail here, but is of great interest, is the use of the trihalide hybrid perovskites in window glass, where power is generated using semitransparent photovoltaic technology, as shown in Figure . [ 106,107 ] To further show the widespread potential applications of these unique semiconducting materials, other examples that are not only examined here but are of potential interest is the potential applications of them for field‐effect transistors (FETs) and other transistors such as metal–oxide–semiconductor FETs (MOSFETs), as shown in Figure a. In particular due to the direct bandgap, large absorption coefficient, large charge carrier mobility and ambipolar properties, phototransistors are able to be produced and micrometer‐thin perovskite single crystals have been found to have higher mobilities within these transistors than their thinfilm polycrystalline counterparts.…”