Highly Efficient Semitransparent Solar Cells with Selective Absorption and Tandem Architecture
Highly Efficient Semitransparent Solar Cells with Selective Absorption and Tandem Architecture
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DOI：
10.1002/adma.201901683
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发表时间：
2019-07
影响因子：
29.4
通讯作者：
Lijian Zuo;Xueliang Shi;W. Fu;A. Jen
中科院分区：
文献类型：
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作者：
Lijian Zuo;Xueliang Shi;W. Fu;A. Jen
在紫外或/和近红外（NIR）范围内具有选择性吸收并减少能量损失的半透明（ST）光致变色材料（PV）对于高效太阳能窗应用至关重要。在这里，展示了一种高性能串联ST-PV，在太阳光谱的理想区域具有选定的吸收。首先开发了超大带隙钙钛矿膜（FAPbBr2.43Cl0.57，Eg = 2.36 eV）以实现在UV区域中的有效选择性吸收。优化后，相应的ST单结（SJ）PV表现出的平均透射率（AVT）为1.68%，效率为1.75%。通过依次减少低带隙有机体异质结层中的可见光吸收组分，实现了在NIR中具有选择性吸收的ST-PV，其功率转换效率（PCE）为5.9%，AVT高达62%。SJ ST-PV的串联结构进一步降低了与之相关的能量损失，其PCE高达10.7%，AVT高达52.91%，光利用效率高达5.66%。这些结果代表了迄今为止报道的所有ST-PV中AVT和PCE的最佳平衡，这种设计应该为高性能太阳能窗户铺平道路。
Semitransparent (ST) photovoltaics (PVs) with selective absorption in the UV or/and near‐infrared (NIR) range(s) and reduced energy losses, are critical for high‐efficiency solar‐window applications. Here, a high‐performance tandem ST‐PV with selected absorption in the desirable regions of the solar spectrum is demonstrated. An ultralarge‐bandgap perovskite film (FAPbBr2.43Cl0.57, Eg ≈ 2.36 eV) is first developed to fulfil efficient selective absorption in the UV region. After optimization, the corresponding ST single junction (SJ) PV exhibits an averaged transmittance (AVT) of ≈68% and an efficiency of ≈7.5%. By sequentially reducing the visible absorbing component in a low‐bandgap organic bulk‐heterojunction layer, an ST‐PV with selective absorption in the NIR is achieved with a power conversion efficiency (PCE) of 5.9% and a high AVT of 62%. The energy loss associated with the SJ ST‐PVs is further reduced with a tandem architecture, which affords a high PCE of 10.7%, an AVT of 52.91%, and a light utilization efficiency up to 5.66%. These results represent the best balance of AVT and PCE among all ST‐PVs reported so far, and this design should pave the road for solar windows of high performance.