消除超导异质结太阳能电池中的电场响应以提高操作稳定性
Eliminating the Electric Field Response in a Perovskite Heterojunction Solar Cell to Improve Operational Stability
摘要：
本征和非本征离子迁移对钙钛矿太阳能电池的运行稳定性构成非常大的威胁，并且由于离子迁移的活化能较低以及内部电场的存在而难以完全消除。我们提出了一种异质结路线，以帮助抑制离子迁移，从而从消除钙钛矿吸收剂中的电场响应的角度提高电池的操作稳定性。在电子传输层（ETL）和钙钛矿吸收体之间引入重掺杂的p型（p+）薄层半导体。异质结电荷耗尽和电场限于ETL和p+层，而钙钛矿吸收剂和空穴传输层保持中性。p+层具有多种候选材料，并且对缺陷密度和载流子迁移率具有耐受性，这使得这种异质结路线在实际应用中具有高度可行性和前景。
英文摘要：
Intrinsic and extrinsic ion migration is a very large threat to the operational stability of perovskite solar cells and is difficult to completely eliminate due to the low activation energy of ion migration and the existence of internal electric field. We propose a heterojunction route to help suppress ion migration, thus improving the operational stability of the cell from the perspective of eliminating the electric field response in the perovskite absorber. A heavily doped p-type (p+) thin layer semiconductor is introduced between the electron transporting layer (ETL) and perovskite absorber. The heterojunction charge depletion and electric field are limited to the ETL and p+ layers, while the perovskite absorber and hole transporting layer remain neutral. The p+ layer has a variety of candidate materials and is tolerant of defect density and carrier mobility, which makes this heterojunction route highly feasible and promising for use in practical applications.
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