AOSL LAB @ Yonsei Univ

AOSL Introduction

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Recent research highlight

Trapped Charges: A Fundamental Cause for Light-Induced Instability in PerovskitesOne of the weakest points in organic–inorganic hybrid perovskites is their instability against light, which has puzzled the research and industry communities despite a lot of efforts conducted so far. Although how perovskites break down under light illumination has been much investigated and verified, where chemical degradation occurs in the presence of oxygen and moisture, the fundamental cause for light instability in inert conditions remains unclear. A big question with respect to device lifetime is whether a perfect encapsulation method (ideally, no penetration of moisture and oxygen) will lead to long-term stability during an actual energy-harvesting operation. If not, the fundamental cause for light-induced instability needs to be thoroughly investigated and prevented technically during device operation for their commercialization. In this Perspective, we propose the trapped charges as a fundamental cause of both intrinsic and extrinsic degradation induced by light soaking and even the ion migration observed during the degradation process based on experiments and theoretical calculations as well as revisiting previous studies on degradation. Additionally, practical techniques to suppress charge trapping in a device will be discussed for the community.

Connect the Dots | Discover Los Alamos National LaboratoryA LANL postdoc made a discovery in quantum dot research that could revolutionize microelectronics and the multi-hundred-billion-dollar silicon chip industry.

1663 Magazine (Interview)

Colloidal Semiconductor Nanocrystal Lasers and Laser Diodes

Chemical Reviews Published (2023)

Selected as a cover article

Light amplification by stimulated emission from electrically driven colloidal quantum dots finally achievedIn Nature article, Los Alamos National Laboratory team realizes long-sought capabilities for semiconductor nanocrystal light-amplification devices

1 device, 2 functions: A laser and an LEDLab researchers drive colloidal quantum dot lasing technology closer to device-ready

Advanced Materials Published (2023)

Frontis Cover article

Nature Published (2023)

Lecture & Activities

나노기술협의회 e-Journal Club 강연

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