Colloidal quantum dot light-emitting devices

Article English OPEN
Wood, Vanessa ; Bulović, Vladimir (2010)

Colloidal quantum dot light-emitting devices (QD-LEDs) have generated considerable interest for applications such as thin film displays with improved color saturation and white lighting with a high color rendering index (CRI). We review the key advantages of using quantum dots (QDs) in display and lighting applications, including their color purity, solution processability, and stability. After highlighting the main developments in QD-LED technology in the past 15 years, we describe the three mechanisms for exciting QDs - optical excitation, Fo¨ rster energy transfer, and direct charge injection - that have been leveraged to create QD-LEDs. We outline the challenges facing QDLED development, such as QD charging and QD luminescence quenching in QD thin films. We describe how optical downconversion schemes have enabled researchers to overcome these challenges and develop commercial lighting products that incorporate QDs to achieve desirable color temperature and a high CRI while maintaining efficiencies comparable to inorganic white LEDs (>65 lumens per Watt). We conclude by discussing some current directions in QD research that focus on achieving higher efficiency and air-stable QD-LEDs using electrical excitation of the luminescent QDs. Keywords: nanocrystals; optoelectronics; displays; lighting (Published: 7 July 2010) Citation: Nano Reviews 2010, 1: 5202 - DOI: 10.3402/nano.v1i0.5202
  • References (25)
    25 references, page 1 of 3

    1. Murray CB, Norris DJ, Bawendi MG. Synthesis and characterization of nearly monodisperse CdE (E sulfur, selenium, tellurium) semiconductor nanocrystallites. J Am Chem Soc 1993; 115: 8706 15.

    2. Coe S, Woo WK, Bawendi MG, Bulovic´ V. Electroluminescence from single monolayers of nanocrystals in molecular organic devices. Nature 2002; 420: 800 3.

    3. Tekin E, Smith PJ, Hoeppener S, van de Berg AMJ, Susha AS, Rogach AL, et al. Inkjet printing of luminescent CdTe nanocrystal-polymer composites. Adv Funct Mat 2007; 17: 23 8.

    4. Wood V, Panzer ML, Long J, Bradley MS, Halpert JE, Bawendi MG, et al. Inkjet printing of polymer-quantum dot composites for full color AC electroluminescent displays. Adv Mater 2009; 21: 2151 5.

    5. Kim LA, Anikeeva PO, Coe-Sullivan SA, Steckel JS, Bawendi MG, Bulovic´ V. Contact printing of quantum dot light-emitting devices. Nano Lett 2008; 8: 4513 7.

    6. Chan W, Nie S. Quantum dot bioconjugates for ultrasensitive nonisotopic detection. Science 1998; 281: 2016 8.

    7. Stouwdam JW, Janssen RAJ. Red, green, and blue quantum dot LEDs with solution processable ZnO nanocrystal electron injection layers. J Mater Chem 2008; 18: 1889 94.

    8. Cho K-S, Lee EK, Joo WJ, Jang E, Kim TH, Lee SJ, et al. Highperformance crosslinked colloidal quantum-dot light emitting diodes. Nat Photonics 2009; 3: 341 5.

    9. Hines MA, Guyot-Sionnest P. Synthesis and characterization of strongly luminescing ZnS-capped CdSe nanocrystals. J Phys Chem 1996; 100: 468 71.

    10. Chen Y, Vela J, Htoon H, Casson JL, Werder DJ, Bussian DA, et al. 'Giant' multishell CdSe nanocrystal quantum dots with suppressed blinking. J Am Chem Soc 2008; 130: 5026 7.

  • Similar Research Results (3)
  • Metrics
    No metrics available
Share - Bookmark