Ultra‐lightweight and flexible solar cells are desired for many potential applications, such as self‐powered aviation, wearable electronics, and the Internet of things. PbS quantum dots (QDs) are good candidates for this purpose due to their low‐cost and low‐temperature processing. In this work, a thin layer of parylene (1 µm) is deposited on a poly(ethylene teraphthalate) (PET) substrate using chemical vapor deposition (CVD) and is employed as a flexible substrate for PbS QDs solar cell. Here, the commonly used ITO electrode in the QDs photovoltaics (PVs) is replaced by CVD‐graphene and its wettability issue is addressed using a thin layer of oxidative CVD poly(3,4‐ethylene dioxythiophene) (oCVD PEDOT), which also works as second hole transporting layer in the device. Inverted PbS QDs device is fabricated on PET/parylene/graphene/oCVD PEDOT stack and finally by removing the PET substrate, an ultra‐lightweight PbS QDs solar cell is achieved. Using this architecture, a power conversion efficiency (PCE) of 7.1% and a power‐per‐weight of 12.3 W g⁻¹ are achieved. Additionally, the QDs device on graphene shows good flexibility as compared to the device on PET/ITO. This work highlights the advantages of oCVD PEDOT and CVD‐graphene for the fabrication of flexible and ultralight weight photostatics.

中文翻译：

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高效，灵活，超轻型倒装PbS量子点太阳能电池在具有高功率重的聚对二甲苯/石墨烯/ oCVD PEDOT基板上全CVD生长

超轻量和柔性太阳能电池对于许多潜在的应用是需要的，例如自供电的航空，可穿戴电子设备和物联网。由于其低成本和低温处理，PbS量子点（QDs）是用于此目的的良好候选者。在这项工作中，使用化学气相沉积（CVD）在聚对苯二甲酸乙二酯（PET）基板上沉积一层聚对二甲苯（1 µm）薄层，并将其用作PbS QDs太阳能电池的柔性基板。在这里，量子点光伏（PV）中常用的ITO电极被CVD-石墨烯代替，并且其润湿性问题通过使用氧化性CVD聚（3,4-乙烯二氧噻吩）薄层（oCVD PEDOT）得以解决。作为器件中的第二空穴传输层。倒装的PbS QDs器件是在PET /聚对二甲苯/石墨烯/ oCVD PEDOT叠层上制造的，最后通过移除PET基板，获得了超轻的PbS QDs太阳能电池。使用该架构，功率转换效率（PCE）为7.1％，单位重量功率为12.3 W g达到^-1。此外，与PET / ITO上的设备相比，石墨烯上的QDs设备显示出良好的柔韧性。这项工作突出了oCVD PEDOT和CVD-石墨烯在制造柔性和超轻型光静电剂方面的优势。