Toward Understanding the Built-in Field in Perovskite Solar Cells through Layer-by-Layer Surface Photovoltage Measurements.

ABSTRACT: The built-in voltage (V_BI) is a key parameter for solar cell operation, yet in perovskite solar cells the distribution, magnitude, and origin of the V_BI remains poorly understood. In this work, we systematically studied the V_BI in pin-type perovskite solar cells based on different hole transport layers (TLs). To this end, we determine the surface photovoltage (SPV) of partial and complete device stacks layer-by-layer by measuring the work function (WF) under dark and light (equivalent AM1.5G) conditions with Kelvin probe (KP) and photoemission spectroscopy (UPS) measurements in 3 different laboratories. We demonstrate that the SPV increases upon the addition of each additional layer until it equals the open-circuit voltage (V<

SUBMITTER: Gutierrez-Partida E 

PROVIDER: S-EPMC11843610 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature