Affiliation:
1. AMOLF Institute Science Park 104 Amsterdam 1098XG The Netherlands
2. TNO Energy Transition Westerduinweg 3 Petten 1755LE Netherlands
3. Institute of Physics University of Amsterdam Science Park 904 Amsterdam 1098XH The Netherlands
4. Molecular Materials and Nanosystems and Institute for Complex Molecular Systems Eindhoven University of Technology 5600 MB Eindhoven Eindhoven The Netherlands
Abstract
AbstractBack‐contact perovskite solar cells offer a significant potential to reach high efficiency due to reduced parasitic absorption from the top surface. However, the currently reported efficiencies are considerably lower (<10%) than planar perovskite solar cells (>20%). Herein, back‐contact perovskite solar cells are fabricated to study loss mechanisms that cause low device efficiency. This work spatially resolves the short‐circuit current, open‐circuit voltage, photoluminescence quantum yield, carrier lifetime, and external quantum efficiency of the devices. The results indicate that the front surface recombination, increased nonradiative recombination at hole contact layer/perovskite interface, and the extraction barriers are three main mechanisms limiting devices from achieving high efficiencies.
Subject
Industrial and Manufacturing Engineering,Mechanics of Materials,General Materials Science