具有商业可行寿命的无机CsPbI3钙钛矿太阳能电池的前景

APL Energy Pub Date : 2023-04-24 DOI:10.1063/5.0147116
Alan B. Kaplan, Q. Burlingame, Rudolph Holley, Y. Loo
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摘要

钙钛矿CsPbI3是一种很有前途的光伏吸收材料,因为它具有理想的硅串联太阳能电池带隙,与有机-无机混合钙钛矿相比,它具有优异的热化学稳定性。然而,与黄色非钙钛矿δ相相比,CsPbI3具有光活性的β-和γ-多晶在室温下热力学不稳定,因此CsPbI3具有自身的稳定性挑战。因此,稳定CsPbI3已成为近年来大量研究的主题。虽然一些方法,如卤化物合金化和减小晶域尺寸,已被证明在改善相稳定性方面是有效的,但到目前为止,与最先进的CsPbI3太阳能电池相比,这些好处是以牺牲光伏效率为代价的。从这个角度来看,我们讨论了无机钙钛矿稳定技术的进展和局限性,并展望了如何实现商业上可行的效率和寿命的无机钙钛矿太阳能电池。
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Prospects for inorganic CsPbI3 perovskite solar cells with commercially viable lifetimes
Perovskite CsPbI3 is a promising photovoltaic absorber material, thanks to its ideal bandgap for Si-tandem solar cell applications and its excellent thermochemical stability compared with hybrid organic–inorganic perovskites. However, CsPbI3 has its own stability challenges as its photoactive β- and γ-polymorphs are thermodynamically unstable at room temperature compared with the yellow non-perovskite δ-phase. Stabilizing CsPbI3 has, thus, been the subject of considerable research in recent years. While some approaches, such as alloying with halides and reducing crystalline domain size, have proven effective in improving phase stability, these benefits have, thus far, come at the expense of photovoltaic efficiency compared with the state-of-the-art CsPbI3 solar cells. In this perspective, we discuss the progress and limitations of inorganic perovskite stabilization techniques and look forward at how to achieve inorganic perovskite solar cells with both commercially viable efficiencies and lifetimes.
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