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×îÐÂÒ»ÆÚµÄNature PhotonicsÔÓÖ¾£¨×ÔÈ»¡¤¹â×Óѧ£©¿¯·¢ÁËÓÉÁ¿×Óµã´óÅ£M.G. BawendiºÍV. Bulović¿ÎÌâ×é׫дµÄ¹ØÓÚ½ºÌåÁ¿×ӵ㷢¹â¼¼ÊõµÄ×ÛÊöÎÄÕ£¬ÌâĿΪEmergence of colloidal quantum-dot light-emitting technologies¡£ÒÔп¡¢ïÓµÄÁòÊô»¯ºÏÎïΪ´ú±íµÄÁ¿×ÓµãÔÚ¹âÖ·¢¹âÒÔ¼°µçÖ·¢¹âÁìÓòÒ»Ö±ÊÕµ½¹ã·ºµÄÑо¿£¬±¾ÎĽéÉÜÁËп¡¢ïÓµÄÁòÊô»¯ºÏÎïµÈ½ºÌåÁ¿×ÓµãµÄ·¢¹âÔÀíÒѾÑо¿½øÕ¹¡£ÎÄÕÂ11Ò³£¬ÒýÎÄ158ƪ¡£ Since their inception 18 years ago, electrically driven colloidal quantum-dot light-emitting devices (QD-LEDs) have increased in external quantum efficiency from less than 0.01% to around 18%. The high luminescence efficiency and uniquely size-tunable colour of solution-processable semiconducting colloidal QDs highlight the potential of QD-LEDs for use in energy-efficient, high-colour-quality thin-film display and solid-state lighting applications. Indeed, last year saw the first demonstrations of electrically driven full-colour QD-LED displays, which foreshadow QD technologies that will transcend the optically excited QD-enhanced lighting products already available today. We here discuss the key advantages of using QDs as luminophores in LEDs and outline the operating mechanisms of four types of QD-LED. State-of-the-art visible-wavelength LEDs and the promise of near-infrared and heavy-metal-free devices are also highlighted. As QD-LED efficiencies approach those of molecular organic LEDs, we identify the key scientific and technological challenges facing QD-LED commercialization and offer our outlook for on-going strategies to overcome these challenges. . nphoton_2012_328-f1.jpg nphoton.2012.328-f2.jpg nphoton.2012.328-f3.jpg nphoton.2012.328-f4.jpg nphoton.2012.328-f5.jpg nphoton.2012.328-f6.jpg [ À´×Ô¿ÆÑмÒ×å ²ÄÁϼÒ×å ] |
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