Efficient Hybrid Solar Cells Based on Meso-Superstructured Organometal Halide Perovskites
Efficient Hybrid Solar Cells Based on Meso-Superstructured Organometal Halide Perovskites
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DOI：
10.1126/science.1228604
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发表时间：
2012-11-02
期刊：
影响因子：
56.9
通讯作者：
Snaith, Henry J.
中科院分区：
文献类型：
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作者：
Lee, Michael M.;Teuscher, Joel;Snaith, Henry J.
与分离紧密结合的激子（光致电子-空穴对）和从高度无序的低迁移率网络中提取自由电荷相关的能量成本代表了许多低成本光伏技术的基本损失。我们报告了一种低成本，可溶液加工的太阳能电池，基于具有强烈可见光至近红外吸收率的高度结晶钙钛矿吸收剂，在模拟全阳光下，单结器件的功率转换效率为10.9%。这种“介观超结构太阳能电池”表现出非常少的基本能量损失;它可以产生超过1.1伏的开路光电压，尽管吸收带隙相对较窄，为1.55电子伏。该功能源于使用中孔氧化铝作为惰性支架，其结构化吸收剂并迫使电子驻留在钙钛矿中并通过钙钛矿传输。
The energy costs associated with separating tightly bound excitons (photoinduced electron-hole pairs) and extracting free charges from highly disordered low-mobility networks represent fundamental losses for many low-cost photovoltaic technologies. We report a low-cost, solution-processable solar cell, based on a highly crystalline perovskite absorber with intense visible to near-infrared absorptivity, that has a power conversion efficiency of 10.9% in a single-junction device under simulated full sunlight. This "meso-superstructured solar cell" exhibits exceptionally few fundamental energy losses; it can generate open-circuit photovoltages of more than 1.1 volts, despite the relatively narrow absorber band gap of 1.55 electron volts. The functionality arises from the use of mesoporous alumina as an inert scaffold that structures the absorber and forces electrons to reside in and be transported through the perovskite.