来自英国牛津、剑桥和巴斯大学、美国麻省理工和荷兰代尔夫特工业大学的联合研究团队发现，通过谨慎使用光和湿度，晶体钙钛矿结构的缺陷可以被永久修复。这一发现足以加速现有钙钛矿太阳能电池的开发。
在钙钛矿太阳能电池和LED中，缺陷造成了转换效率的大量流失。研究小组此前发现，这一缺陷可通过利用光线获得暂时修复，现在他们进一步发现了一种更持久的方法。
研究团队制造了一个能与可伸缩卷-到-卷生产技术兼容的钙钛矿器件，在制造完成前，他们将其暴露在光、氧和湿度中30分钟，然后沉积其余的层面来完成器件的制造。
光线的使用和适当的湿度水平，使电子与氧气结合形成超氧化物，防止缺陷阻碍电子。湿度的存在使钙钛矿表面变成了一个保护壳，去除了表面的缺陷，锁住了超氧化物，使修复效果得以持续更长的时间。
研究人员表示，已经看到发光效率从1%提高到89%，认为100%可以实现，而这意味着几乎没有电压损失，但当然还有很多工作要做。
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