Kinoshita Takumi, Nonomura Kazuteru, Joong Jeon Nam, Giordano Fabrizio, Abate Antonio, Uchida Satoshi, Kubo Takaya, Seok Sang Il, Nazeeruddin Mohammad Khaja, Hagfeldt Anders, Grätzel Michael, Segawa Hiroshi
Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8904, Japan.
Department of Chemistry and Chemical Engineering, Laboratory of Photomolecular Science, Swiss Federal Institute of Technology, Station 6, CH-1015 Lausanne, Switzerland.
Nat Commun. 2015 Nov 5;6:8834. doi: 10.1038/ncomms9834.
The extension of the light absorption of photovoltaics into the near-infrared region is important to increase the energy conversion efficiency. Although the progress of the lead halide perovskite solar cells is remarkable, and high conversion efficiency of >20% has been reached, their absorption limit on the long-wavelength side is ∼800 nm. To further enhance the conversion efficiency of perovskite-based photovoltaics, a hybridized system with near-infrared photovoltaics is a useful approach. Here we report a panchromatic sensitizer, coded DX3, that exhibits a broad response into the near-infrared, up to ∼1100 nm, and a photocurrent density exceeding 30 mA cm(-2) in simulated air mass 1.5 standard solar radiation. Using the DX3-based dye-sensitized solar cell in conjunction with a perovskite cell that harvests visible light, the hybridized mesoscopic photovoltaics achieved a conversion efficiency of 21.5% using a system of spectral splitting.
将光伏材料的光吸收扩展到近红外区域对于提高能量转换效率至关重要。尽管铅卤化物钙钛矿太阳能电池取得了显著进展，并且已经达到了超过20%的高转换效率，但其在长波长一侧的吸收极限约为800纳米。为了进一步提高基于钙钛矿的光伏材料的转换效率，与近红外光伏材料的混合系统是一种有用的方法。在此，我们报道了一种全色敏化剂，编码为DX3，它在近红外区域表现出宽泛的响应，直至约1100纳米，并且在模拟的空气质量1.5标准太阳辐射下光电流密度超过30毫安每平方厘米。将基于DX3的染料敏化太阳能电池与收集可见光的钙钛矿电池相结合，这种混合介观光伏材料通过光谱分裂系统实现了21.5%的转换效率。
