Researchers demonstrate high light extraction efficiency of perovskite photonic crystals

Researchers at NTU, lead by Assoc. Prof. Wang Hong, recently demonstrated high light extraction efficiency of perovskite photonic crystals fabricated by delicate electron-beam lithography.

Researchers demonstrate high light extraction efficiency of perovskite photonic crystals image

The perovskite photonic crystals exhibit both emission rate inhibition and light energy redistribution simultaneously. They observed 7.9-fold reduction of spontaneous emission rate with a slower decay in perovskite photonic crystals due to photonic bandgap effect (PBG).

They also reported 23.5-fold emission intensity enhancement as results of light energy redistribution from 2D guided modes to vertical direction in perovskite photonic crystals thin films, indicating a high intrinsic light extraction efficiency.

This observation is the second largest extraction efficiency with two-dimensional photonic crystals in comparison with that of 500 folds in Silicon. These findings offer a new promising approach in various applications for perovskite, including solar cell, displays and photovoltaics.

Posted: Apr 01,2019 by Ron Mertens