Abstract
Perovskite solar cells have shown a meteoric rise of power conversion efficiency and a steady pace of improvements in their stability of operation. Such rapid progress has triggered research into approaches that can boost efficiencies beyond the Shockley–Queisser limit stipulated for a single‐junction cell under normal solar illumination conditions. The tandem solar cell architecture is one concept here that has recently been successfully implemented. However, the approach of solar concentration has not been sufficiently explored so far for perovskite photovoltaics, despite its frequent use in the area of inorganic semiconductor solar cells. Here, the prospects of hybrid perovskites are assessed for use in concentrator solar cells. Solar cell performance parameters are theoretically predicted as a function of solar concentration levels, based on representative assumptions of charge‐carrier recombination and extraction rates in the device. It is demonstrated that perovskite solar cells can fundamentally exhibit appreciably higher energy‐conversion efficiencies under solar concentration, where they are able to exceed the Shockley–Queisser limit and exhibit strongly elevated open‐circuit voltages. It is therefore concluded that sufficient material and device stability under increased illumination levels will be the only significant challenge to perovskite concentrator solar cell applications.
Highlights
Perovskite solar cells have shown a meteoric rise of power conversion efficiency perovskites have been extensively investigated, revealing high charge-carrier and a steady pace of improvements in their stability of operation
Perovskite solar cells have emerged over the last few years as triggered intense activities on measures designed to go beyond highly promising photovoltaic applications, with power conver- the Shockley–Queisser limit predicted for a single-junction cell sion efficiencies (PCEs) improving at an unprecedented rate. under standard solar illumination.[17,18]
One advan- We show that the PCE of perovskite concentrator solar cells (PCSCs) should clearly improve with tage is that, compared with tandem solar cells, there is no addi- increasing illumination, and ought to eventually overtake the tional effort required in the fabrication of the actual solar cell Shockley–Queisser limit at a few tens to hundreds of suns irradevice
Summary
Solar cell performance parameters are theoretically predicted as a function of solar concentration levels, based on representative assumptions of charge-carrier recombination and extraction rates issue of stability, with recent developments suggesting that perovskite solar cells may deliver stable output for a few thousand hours under 1 sun (AM 1.5G) illumination.[11,12] Measures to improve stability in the device. Promising recent studies have suggested that HOIPs exhibit an increasing photoluminescence quantum yield (PLQY) with increasing illumination of up to a few thousand suns, suggesting a stable enhancement of performance under solar concentrator conditions may be practically feasible.[28] Motivated by these factors, we assess in this work the prospects for perovskite photovoltaics under solar concentration. With tandem devices, and widely used with efficient multijunction tandem solar cells,[25,26] thereby combining the best of both approaches
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