Photoluminescence (PL) signal of a material provides information on the chemical composition, energy bandgap, recombination, and defects . During the crystallization and film formation of perovskite or organic materials, in-situ PL provides direct information on the optoelectronic properties of the out-of-equilibrium phase, and helps in understanding crystallization and film formation kinetics. It helps to bring insight into developing novel high performance materials.
Crystallization and film formation dynamics
In-situ Photoluminescence (PL)
Degradation: Evolution of defects
Sensitive External Quantum Efficiency (S-EQE)
We have developed a highly sensitive external in-situ quantum efficiency (s-EQE) technique with a dynamic range of 10E9 (from 100% to 10E-7%). Such high sensitivity is capable to measure the photocurrent generated by excitation the defect stats in mid-gaps. This in-situ technique helps to understand the evolution of defect states under different operation conditions, and provides insight to further stabilize the materials for long-term applications.
Excitonic Properties of Materials