Hybrid Perovskite Thin Films as Highly Efficient Luminescent Solar Concentrators

Abstract

Organic–inorganic hybrid perovskite (PVSK) compounds are at the forefront of photovoltaic research, consistently surpassing silicon solar cells in power conversion efficiency. Possessing high refractive index, broad absorption spectrum, and superior quantum yields, hybrid PVSK thin films are theoretically also ideal candidates for luminescent solar concentrators (LSCs). In practice, however, the possibility of high self‐absorption in a continuous film, coupled with the inherent instability of PVSK materials, have hindered their use in this context. In this work, the viability of hybrid PVSK thin films as the active medium in planar LSCs is investigated. Using spectroscopic and photovoltaic measurements, variation of optical stability and device performance with different lead sources in the PVSK film precursors are monitored. The results display high optical efficiency in the range 15%–29% despite high self‐absorption losses, and the devices remain operational even after seven weeks in ambient conditions. Confirmed by Monte Carlo simulations, the superior performance is attributed to the high quantum yield and refractive index of the PVSKs. These results are encouraging not only for the implementation of PVSK thin films in LSCs, but additionally, for preparation of tandem devices to capture energy escaping as radiative exciton recombination in PVSK solar cells.

Zero‐Dimensional Perovskite Nanocrystals for Efficient Luminescent Solar Concentrators

“…Among various types of fluorophores, perovskite NCs have attracted a lot of attention as building blocks in LSCs, in view of their size/composition‐dependent absorption and emission spectra, high brightness with a PL QY up to 100%, and facile wet‐chemistry synthesis . For example, with the use of tributylphosphine ligands in the CsPbBr 3 synthesis, 100% of PL QY has been achieved for CsPbI 3 QDs and CsPbBr 3 nanoplatelets .…”

“…For example, with the use of tributylphosphine ligands in the CsPbBr 3 synthesis, 100% of PL QY has been achieved for CsPbI 3 QDs and CsPbBr 3 nanoplatelets . Recently, the LSCs have already been fabricated by coating perovskite thin‐film on the glass, or embedding inorganic 3D CsPbX 3 (X = Cl, Br, I), mixed‐halide CsPb(Br x I 1‐x ) 3 , and doped CsPbCl 3 NCs in polymer matrix, while the current obtained external optical efficiency (η opt ) in single‐layer LSCs based on perovskite NCs is still low . Although Mn‐doped CsPbCl 3 perovskite NCs (or Yb 3+ ‐doped CsPbCl 3 ) can be as reabsorption‐free emitters, Meinardi et al highlighted that CsPbCl 3 ‐based perovskites are not suitable for the highly efficient large‐area LSCs due to both their relatively low PL QY (<15%) and their wide energy gap (only absorb sunlight less than 400 nm).…”

The Renaissance of Luminescent Solar Concentrators: The Role of Inorganic Nanomaterials

“…[83] The paper demonstrates the promising properties of this class of semiconductors thanks to the limited spectral overlap, the broad absorption spectrum and the extreme quantum yield (>80%), resulting in an impressive maximum optical efficiency of 29%. [83] The paper demonstrates the promising properties of this class of semiconductors thanks to the limited spectral overlap, the broad absorption spectrum and the extreme quantum yield (>80%), resulting in an impressive maximum optical efficiency of 29%.…”

Smart Sensing Systems Using Wearable Optoelectronics

“…Organometallic halide perovskites are characterized by high power conversion efficiencies and photoluminescence quantum efficiencies with adjustment for different types and sizes of halide atoms. Due to outstanding properties, organometallic halide perovskites are applied to various optoelectronic devices including solar cells . Recent research utilized inkjet printing to explore patterning techniques, whereas a method of printing the 3D perovskite nanostructure was proposed .…”