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Highly Efficient Semitransparent Solar Cells with Selective Absorption and Tandem Architecture.
Advanced Materials ( IF 27.4 ) Pub Date : 2019-07-25 , DOI: 10.1002/adma.201901683 Lijian Zuo 1 , Xueliang Shi 1 , Weifei Fu 1 , Alex K-Y Jen 1, 2, 3
Advanced Materials ( IF 27.4 ) Pub Date : 2019-07-25 , DOI: 10.1002/adma.201901683 Lijian Zuo 1 , Xueliang Shi 1 , Weifei Fu 1 , Alex K-Y Jen 1, 2, 3
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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 (FAPbBr2.43 Cl0.57 , 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.
中文翻译：
具有选择性吸收和串联结构的高效半透明太阳能电池。
在紫外线或/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）光伏（PV）对高效太阳能窗口应用至关重要。在此，展示了在太阳光谱的理想区域具有选定吸收率的高性能串联ST-PV。首先开发了超大带隙钙钛矿薄膜（FAPbBr2.43 Cl0.57，Eg≈2.36 eV）以实现在紫外线区域的有效选择性吸收。经过优化后，相应的ST单结（SJ）PV表现出的平均透射率（AVT）约为68％，效率约为7.5％。通过依次减少低带隙有机体异质结层中的可见光吸收成分，可以实现NIR选择性吸收的ST-PV，功率转换效率（PCE）为5.9％，AVT为62％。串联架构进一步降低了与SJ ST-PV相关的能量损耗，该架构提供了10.7％的高PCE，52.91％的AVT和高达5.66％的光利用率。这些结果代表了迄今为止报告的所有ST-PV中AVT和PCE的最佳平衡，这种设计应为高性能太阳能窗户铺平道路。
更新日期：2019-07-25
中文翻译：
具有选择性吸收和串联结构的高效半透明太阳能电池。
在紫外线或/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）光伏（PV）对高效太阳能窗口应用至关重要。在此，展示了在太阳光谱的理想区域具有选定吸收率的高性能串联ST-PV。首先开发了超大带隙钙钛矿薄膜（FAPbBr2.43 Cl0.57，Eg≈2.36 eV）以实现在紫外线区域的有效选择性吸收。经过优化后，相应的ST单结（SJ）PV表现出的平均透射率（AVT）约为68％，效率约为7.5％。通过依次减少低带隙有机体异质结层中的可见光吸收成分，可以实现NIR选择性吸收的ST-PV，功率转换效率（PCE）为5.9％，AVT为62％。串联架构进一步降低了与SJ ST-PV相关的能量损耗，该架构提供了10.7％的高PCE，52.91％的AVT和高达5.66％的光利用率。这些结果代表了迄今为止报告的所有ST-PV中AVT和PCE的最佳平衡，这种设计应为高性能太阳能窗户铺平道路。
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