Abstract
A Sn-ball was integrated with a colloidal quantum dot light-emitting diode package to achieve effective heat and reliability management. The electric, optical intensity, and heat distributions of the package were evaluated under various radiant fluxes; data were collected at the 90th hour of aging. Under 1 W/cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> , the areal temperature decreased from 38.5 °C (without Sn-ball) to 32.3 °C (with Sn-ball), which helped extend the lifetime of the colloidal quantum dots in the package. Specifically, the introduction of the metal ball structure engendered a two- to three-fold increase in lifetime. The study findings could contribute toward integrating quantum dots into photonic devices.
Highlights
C OLLOIDAL quantum dots (CQDs) are considered promising materials for fabricating optoelectronic devices, such as solar cells and light-emitting diodes (LEDs), because they afford unique optical properties such as high quantum yield, variable color emission, and narrow emission linewidth [1]–[9]
CQDs are very effective in photon conversion, they are still marred by some problems that limit their widespread use
The operating temperature of CQDs directly affects the optical performance of a device
Summary
C OLLOIDAL quantum dots (CQDs) are considered promising materials for fabricating optoelectronic devices, such as solar cells and light-emitting diodes (LEDs), because they afford unique optical properties such as high quantum yield, variable color emission, and narrow emission linewidth [1]–[9]. Direct electrically driven or optical pumping methods have proved effective for exciting quantum dots (QDs) [10]. Numerous products in solid state lighting, display panels, and even photomedicine can use CQDs for high quality light sources, efficient biological treatments, or flexible panels on non-flat surfaces [11]–[14]. CQDs are very effective in photon conversion, they are still marred by some problems that limit their widespread use. For directly driven CQDs, band alignment is essential
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