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Research Highlight

KSJ research group aims to develop and characterize novel functional materials. 

We synthesize novel materials and measure optical, electrical, magnetic, and chemical properties using various methods. Performing both synthesis and characterization enables us to clearly understand the underlying photophysical and photochemical phenomena. Also, we fabricate QLED and infrared photodetectors.

i) Steady-state intraband and interband transitions of Quantum Dots

ii) QLED and IR QD Photodetector

iii) Quantum Plasmon Resonance of Nanocrystals

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iv) Infrared lasing nanomaterials

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Publication

"Extended Short-Wavelength Infrared Ink by Surface-Tuned Silver Telluride Colloidal Quantum Dots and Their Infrared Photodetection"

ACS Materials Lett. 2024, 6, 4988−4996

Silver telluride colloidal quantum dots (CQDs) can be a promising alternative to traditional Pb- or Cd-based narrow-band gap semiconductors due to their low toxicity. However, the strong binding affinity of thiol ligands has limited the broader use of Ag2Te CQDs, necessitating more versatile surface chemistries.

Here, we synthesized Ag2Te CQDs passivated with oleylamine, which facilitated various ligand passivation strategies. The weak bonding strength allows the preparation of X-Ag2Te CQD (X = Cl, Br, or I ligands) inks, sensitive to 1.1–2.7 μm infrared radiation. 

Congratulations, Song Hae-min has been selected for the Ph.D. academic research support project. Also Jeon So-eun has been selected for the master's academic research support project. 

Congratulations!

송해민 학생이 박사 과정 지원 과제에 선정되었습니다.

전소은 학생이 석사 과정 지원 과제에 선정되었습니다.

축하합니다!

​​News
Contact

우리는 반도체 나노입자 및 적외선 물질을 연구하는 연구자들입니다. 반도체 입자 합성/반도체 레이저/적외선 디텍터 Infrared QD Photodetector 및 QD LED 연구에 관심있는 대학원생과 실험물리화학, 소재합성 또는  광전자/센서소자를 전공한 Post-doc fellow 를 모집 중입니다.(2024.9)

Available position(2025년 1학기)

         : + 대학원생 + 학부연구생 + 박사후연구원

              + 테크니션(석사학위이상) 

We have open positions for passionate graduate students, technicians, and postdocs with backgrounds in chemistry, physics, chemical engineering, material science, and electrical engineering.

kwangsjeong@korea.ac.kr

copyright © 2020 KSJ lab

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