Semiconductor Nanocrystal Optoelectronics: from Wavefunction Engineering to Quantum Purity
Hilmi Volkan Demir b
a NTU Singapore – Nanyang Technological University, School of Electrical and Electronic Engineering, School of Physical and Mathematical Sciences, School of Materials Science and Engineering, Singapore
b Bilkent University UNAM, Department of Electrical and Electronics Engineering, Department of Physics, Institute of Materials Science and Nanotechnology, Ankara, Turkey
Proceedings of MATSUS Spring 2026 Conference (MATSUSSpring26)
D1 Colloidal QDs in visible optoelectronics: focusing on non III-V nanocrystals
Barcelona, Spain, 2026 March 23rd - 27th
Organizers: Se-Woong Baek, Jiwan Kim and Soong Ju Oh
Invited Speaker, Hilmi Volkan Demir, presentation 251
Publication date: 15th December 2025

Colloidal semiconductor nanocrystals allow for enriched color conversion essential to superior lighting and displays. These colloids span different types and heterostructures of semiconductors from colloidal quantum dots to wells. In this talk, we will present recent examples of semiconductor nanocrystal optoelectronic devices using atomically flat, tightly confined colloidal quantum wells (CQWs) [1-9]. By engineering quantum designs of the CQWs, we will show record high efficiency from their colloidal LEDs [10,11] and record high gain coefficients and low lasing thresholds from their colloidal lasers [12,13] in their classes.  We will also discuss the use of these nanocrystals embedded into carefully designed dielectric media to make colloidal metadevices [14]. We will finally present highly engineered quantum wells to make a new class of single-photon emitters with high quantum purity at room temperature [15]. Given their accelerating progress, these solution-processed nanocrystals offer great promise to challenge their epitaxial thin film counterparts in semiconductor optoelectronics.

 

 

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