论文标题
消除钙钛矿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
论文作者
论文摘要
固有和外部离子迁移是对钙钛矿太阳能电池的运行稳定性的极大威胁，由于离子迁移的活力低和内部电场的存在，因此很难完全消除。我们提出了一条杂结途径，以帮助抑制离子迁移，从而从消除钙钛矿吸收器中的电场响应的角度提高了细胞的操作稳定性。在电子传输层（ETL）和钙钛矿吸收器之间引入了掺杂的P型（P+）薄层半导体。异质结的电荷耗竭和电场仅限于ETL和P+层，而钙钛矿的吸收剂和孔传输层保持中性状态。 P+层具有多种候选材料，并且耐受性密度和载流子迁移率耐受性，这使得该异质结途径高度可行，有望在实际应用中使用。
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.
