Real-time observation of light-induced macroscopic changes in thin film solar cells: Device degradation mechanism
- Resource Type
- Conference
- Authors
- Kim, Ka-Hyun; Johnson, Erik V.; Roca i Cabarrocas, Pere
- Source
- 2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC) Photovoltaic Specialists Conference (PVSC), 2016 IEEE 43rd. :0665-0667 Jun, 2016
- Subject
- Aerospace
Components, Circuits, Devices and Systems
Engineered Materials, Dielectrics and Plasmas
Engineering Profession
Fields, Waves and Electromagnetics
Photonics and Electrooptics
Power, Energy and Industry Applications
Photovoltaic cells
Degradation
Pins
Hydrogen
Delamination
Silicon
Substrates
- Language
Hydrogenated polymorphous silicon (pm-Si:H) is a material consisting of a small volume fraction of nanocrystals embedded in an amorphous matrix. pm-Si:H solar cells demonstrate interesting initial degradation behaviors such as rapid initial change in photovoltaic parameters and large macroscopic structural change during light-soaking. The precise dynamics of the light-induced degradation was studied in a series of light-soaking experiments. Complementary studies reveal that the initial degradation of pm-Si:H solar cells originate from the modification of silicon-hydrogen bonding on the surface of silicon nanocrystals in pm-Si:H.