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首页> 外文期刊>RSC Advances >Enhancing the thermal stability of the carbon-based perovskite solar cells by using a CsxFA1?xPbBrxI3?x light absorber
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Enhancing the thermal stability of the carbon-based perovskite solar cells by using a CsxFA1?xPbBrxI3?x light absorber

机译：通过使用CsxFA1？xPbBrxI3？x光吸收剂来增强碳基钙钛矿太阳能电池的热稳定性

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摘要

Despite the impressive photovoltaic performance with a power conversion efficiency beyond 23%, perovskite solar cells (PSCs) suffer from poor long-term stability, failing by far the market requirements. Although many efforts have been made towards improving the stability of PSCs, the thermal stability of PSCs with CH _(3) NH _(3) PbI _(3) as a perovskite and organic hole-transport material (HTM) remains a challenge. In this study, we employed the thermally stable (NH _(2) ) _(2) CHPbI _(3) (FAPbI _(3) ) as the light absorber for the carbon-based and HTM-free PSCs, which can be fabricated by screen printing. By introducing a certain amount of CsBr (10%) into PbI _(2) , we obtained a phase-stable Cs _( x ) FA _(1? x ) PbBr _( x ) I _(3? x ) perovskite by a “two-step” method and improved the device power conversion efficiency from 10.81% to 14.14%. Moreover, the as-prepared PSCs with mixed-cation perovskite showed an excellent long-term stability under constant heat (85 °C) and thermal cycling (?30 °C to 85 °C) conditions. These thermally stable and fully-printable PSCs would be of great significance for the development of low-cost photovoltaics.
机译：尽管钙钛矿型太阳能电池具有令人印象深刻的光伏性能（功率转换效率超过23％），但其长期稳定性却很差，远未达到市场要求。尽管已进行了许多努力来改善PSC的稳定性，但是以CH_（3）NH_（3）PbI_（3）作为钙钛矿和有机空穴传输材料（HTM）的PSC的热稳定性仍然是一个挑战。在这项研究中，我们采用了热稳定（NH _（2）_（2）CHPbI _（3）（FAPbI _（3））作为碳基和无HTM的PSC的光吸收剂，通过丝网印刷制造。通过将一定量的CsBr（10％）引入PbI _（2），我们得到了钙钛矿相稳定的Cs _（x）FA _（1？x）PbBr _（x）I _（3？x）钙钛矿。 “两步法”将设备功率转换效率从10.81％提高到14.14％。此外，所制备的具有混合阳离子钙钛矿的PSC在恒定温度（85°C）和热循环（？30°C至85°C）条件下显示出优异的长期稳定性。这些热稳定且可完全打印的PSC对开发低成本光伏电池具有重要意义。

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