Ultra-Lightweight, Flexible InGaP/GaAs Tandem Solar Cells with a Dual-Function Encapsulation Layer
Ultra-Lightweight, Flexible InGaP/GaAs Tandem Solar Cells with a Dual-Function Encapsulation Layer
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DOI：
10.1021/acsami.1c00006
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发表时间：
2021-03-11
影响因子：
9.5
通讯作者：
Yu, Ki Jun
中科院分区：
文献类型：
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作者：
Kim, Tae Soo;Kim, Hyo Jin;Yu, Ki Jun
III-V族半导体制成的轻质柔性太阳能电池因其出色的效率和功率重量比（比功率），为汽车、无人机、卫星或可穿戴设备等需要电源的设备提供了新的应用机会。然而，由于当前的柔性光伏器件容易受到湿气和热的影响，因此需要增强柔性光伏（PV）器件的比功率和稳定性才能用于此类应用。在此，我们开发了超轻、柔性 InGaP/GaAs 串联太阳能电池，其具有双功能封装层，既可用作有源器件层的防潮层，又可用作抗反射涂层。使用聚合物薄膜作为基材，超薄金属作为粘合层，设备的总重量大大减轻。因此，我们的太阳能电池的比功率非常高，在AM 1.5G太阳光谱下超过5000 W/kg。此外，即使太阳能电池暴露在恶劣的环境条件下也不会发生退化。
Lightweight, flexible solar cells from III-V semiconductors offer new application opportunities for devices that require a power supply, such as cars, drones, satellites, or wearable devices, due to their outstanding efficiency and power-to-weight ratio (specific power). However, the specific power and stability of flexible photovoltaic (PV) devices need to be enhanced for use in such applications because current flexible PV devices are vulnerable to moisture and heat. Here, we develop ultra-lightweight, flexible InGaP/GaAs tandem solar cells with a dual-function encapsulation layer that serves as both a moisture barrier and an antireflection coating for the active device layer. Using a thin polymer film as a substrate and an ultrathin metal as a bonding layer, the total weight of the device is dramatically reduced. Therefore, the specific power of our solar cells is remarkably high with a value of over 5000 W/kg under the AM 1.5G solar spectrum. Additionally, there is no degradation even if the solar cells are exposed to harsh environmental conditions.