Low-dimensional perovskites could help enhance solar cell performance The most notable scientific milestone in photovoltaics in the past several years is the emergence of solar cells based on hybrid organic-inorganic perovskite materials. While conventional silicon and thin-film solar cells have seen steady improvements in their power-conversion efficiencies (PCEs) spanning several decades, hybrid perovskite solar cells have already reached a certified 22.1% PCE (1), matching conventional solar cell technologies in only a few years since their first device architecture was tested. Setting the stage for a disruptive technology in the field of photovoltaics is the seemingly winning combination of properties of hybrid perovskite materials: high absorption coefficient and a tunable energy band gap in wavelengths ideal for solar cells; long diffusion lengths and lifetimes for photogenerated charge carriers, which easily dissociate into efficiently collected electrons and holes; Earth-abundant elemental composition; and their compatibility with low-cost and low-temperature fabrication methods (2–5). On page 1288 of this issue, Blancon et al. (6) report on the observation of an enhanced photoresponse for layered perovskite materials. The results add, literally, a new dimension to the further development of high-performance perovskite solar cells.

中文翻译：

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为钙钛矿光响应供电

低维钙钛矿有助于提高太阳能电池性能 过去几年光伏领域最显着的科学里程碑是基于混合有机-无机钙钛矿材料的太阳能电池的出现。几十年来，传统硅和薄膜太阳能电池的功率转换效率 (PCE) 一直在稳步提高，而混合钙钛矿太阳能电池已达到经认证的 22.1% PCE (1)，仅与传统太阳能电池技术相媲美。自从他们的第一个设备架构经过测试几年后。为光伏领域的颠覆性技术奠定基础的是混合钙钛矿材料看似成功的组合：高吸收系数和太阳能电池理想波长的可调能带隙；光生载流子的扩散长度和寿命长，容易分解为有效收集的电子和空穴；地球上丰富的元素组成；以及它们与低成本和低温制造方法的兼容性（2-5）。在本期第 1288 页上，Blancon 等人。(6) 层状钙钛矿材料光响应增强的报告。从字面上看，这些结果为高性能钙钛矿太阳能电池的进一步开发增添了新的维度。(6) 层状钙钛矿材料光响应增强的报告。从字面上看，这些结果为高性能钙钛矿太阳能电池的进一步开发增添了新的维度。(6) 层状钙钛矿材料光响应增强的报告。从字面上看，这些结果为高性能钙钛矿太阳能电池的进一步开发增添了新的维度。