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| 1 | Efficient,high-CRI white LEDs by combining traditional phosphors with cadmium-free InP/ZnSe red quantum dots显示文摘Quantum dots(QDs) offer an interesting alternative for traditional phosphors in on-chip light-emitting diode(LED) configurations.Earlier studies showed that the spectral efficiency of white LEDs with high color rendering index(CRI) values could be considerably improved by replacing red-emitting nitride phosphors with narrowband QDs.However,the red QDs in these studies were cadmium-based,which is a restricted element in the EU and certain other countries.The use of InP-based QDs,the most promising Cd-free alternative,is often presented as an inferior solution because of the broader linewidth of these QDs.However,while narrow emission lines are the key to display applications that require a large color gamut,the spectral efficiency penalty of this broader emission is limited for lighting applications.Here,we report efficient,high-CRI white LEDs with an on-chip color converter coating based on red InP/ZnSe QDs and traditional green/yellow powder phosphors.Using InP/ZnSe QDs with a quantum yield of nearly 80% and a full width at half-maximum of 45 nm,we demonstrate high spectral efficiency for white LEDs with very high CRI values.One of the best experimental results in terms of both luminous efficacy and color rendering performance is a white LED with an efficacy of 132 lm/W,and color rendering indices of R_(a)≈90,R9 ≈50 for CCT ≈4000 K.These experimental results are critically compared with theoretical benchmark values for white LEDs with on-chip downconversion from both phosphors and red Cd-based QDs.The various loss mechanisms in the investigated white LEDs are quantified with an accurate simulation model,and the main impediments to an even higher efficacy are identified as the blue LED wall-plug Quantum dots(QDs) offer an interesting alternative for traditional phosphors in on-chip light-emitting diode(LED) configurations.Earlier studies showed that the spectral efficiency of white LEDs with high color rendering index(CRI) values could be considerably improved by replacing red-emitting nitride phosphors with narrowband QDs.However,the red QDs in these studies were cadmium-based,which is a restricted element in the EU and certain other countries.The use of In P-based QDs,the most promising Cd-free alternative,is often presented as an inferior solution because of the broader linewidth of these QDs.However,while narrow emission lines are the key to display applications that require a large color gamut,the spectral efficiency penalty of this broader emission is limited for lighting applications.Here,we report efficient,high-CRI white LEDs with an on-chip color converter coating based on red In P/Zn Se QDs and traditional green/yellow powder phosphors.Using In P/Zn Se QDs with a quantum yield of nearly 80% and a full width at half-maximum of 45 nm,we demonstrate high spectral efficiency for white LEDs with very high CRI values.One of the best experimental results in terms of both luminous efficacy and color rendering performance is a white LED with an efficacy of 132 lm/W,and color rendering indices of Ra≈ 90,R9 ≈ 50 for CCT ≈ 4000 K.These experimental results are critically compared with theoretical benchmark values for white LEDs with on-chip downconversion from both phosphors and red Cd-based QDs.The various loss mechanisms in the investigated white LEDs are quantified with an accurate simulation model,and the main impediments to an even higher efficacy are identified as the blue LED wall-plug efficiency and light recycling in the LED package. | BEGA KARADZA HANNES VAN AVERMAET LEILA MINGABUDINOVA ZEGER HENS YOURI MEURET | 2022 | Photonics Research2022，10，1： | 2 |
| 2 | Modeling nitrogen cycling in a mariculture ecosystem as a tool to evaluate its outflow显示文摘 | BACHER C MEURET A | 2001 | Estuarine Coastal and Shelf Science2001，52，： | 1 |
| 3 | Hypobaric spinal an esthesia with ropivacaine plus sufentanil for traumatic femoral neck surgery in the elderly:a dose-response study显示文摘 | Lilot M Meuret P Bouvet L | | 0，，1： | 1 |
| 4 | Modeling approach of nitrogen and phosphorus exchanges at the sediment-water interface of an intensive fishpond system显示文摘 | Lefebvre S Bacher C Meuret A | 2001 | Aquaculture2001，195，9： | 1 |
| 5 | Postoperative analgesia after total knee replacement:the effect of an obturator nerve block added to the femoral 3-in-1 nerve block显示文摘 | Macalou D Trueck S Meuret P | 2004 | Anesth Analg2004，99，1： | 1 |
| 6 | High cortisol awaken- ing response and cortisol levels moderate exposure-basedpsy- chotherapy success显示文摘 | Meuret A E Trueba A F Abelson J L | 2015 | Psychoneuroendocrinology2015，51，： | 1 |
| 7 | High altitudes, anxiety and panic attacks: is there a relationship 显示文摘 | Roth WT Gomolla A Meuret AE | 2002 | Depress Anxiety2002，16，2： | 1 |
| 8 | Auditory steady -state response and Bispectral index for assessing level of consciousness during propofol sedation and hypnosis显示文摘 | Bonhomme V Plourde G Meuret P | 2000 | Anesth Analg2000，91，： | 1 |
| 9 | High altitudes, anxiety and panic attacks: Is there a relationship? 显示文摘 | Roth WT Gomolla A Meuret AE | 2002 | Depress Amdety2002，16，2： | 1 |
| 10 | Conditions of success of a school's self-evaluation:Some lessons of an European experience显示文摘 | Meuret D Morlaix S | | 0，，01： | 1 |
| 11 | LED projector with two liquid crystal on silicon light valves and a fly's eye integrator 显示文摘 | Giel B V Meuret Y Bogaert L | 2008 | Displays(S0141-9382)2008，29，5： | 1 |
| 12 | Coping skills and exposure therapy in panic disorder and agoraphobia: latest ad- vances and future directions显示文摘 | Meuret AE Wolitzky-Taylor KB Twohig MP | 2012 | Behav Ther2012，43，： | 1 |
| 13 | Augmenta- tion of exposure therapy with D-cycloserine for SAD 显示文摘 | Hofmann SG Meuret AE Smits JA | 2006 | Arch Gen Psychiatry2006，63，： | 1 |
| 14 | Auditory steady-state response and bispectral index for assessing level of consciousness during propofol sedation and hypnosis显示文摘 | Bonhomme V Plourde G Meuret P | 2000 | Anesth Analg2000，91，6： | 1 |
| 15 | A-nalysis of two novel concepts for multiview three-dimensionaldisplays using one projector 显示文摘 | Lawrence Bogaert Youri Meuret Herbert De Smet | 2010 | Optical Engineering2010，49，12： | 1 |
| 16 | Monocytopoiesis in chronic eczematous diseases, psoriasis vulgaris, and mycosis fungoides显示文摘 | Meuret G Schmitt E Hagedorn M | 1976 | J Invest Dermatol1976，66，1： | 1 |
| 17 | Hypobaric spinal anesthesia with mpivacaine plus sufentanil for traumatic femoral neck surgery in the elderly: a dose-response study 显示文摘 | Lilot M Meuret P Bouvet L | 2013 | Anesth Analg2013，117，1： | 1 |
| 18 | Propofol anesthesia and cerebral blood flow changes elicited by vibrotactile stimulation:a positron emission tomography study显示文摘 | Fiset P Meuret P | 2001 | J Neurophysiol2001，85，： | 1 |
| 19 | Using a flyr's eye integrator in efficient illumination engines with multiple light-emltting diode light sources显示文摘 | GIEL B V MEURET Y THIENPONT H | 2007 | Opt Eng2007，46，4： | 1 |
| 20 | Using a fly's eye integrator in efficient illumination engines with multiple light- emitting diode light sources显示文摘 | B Van Giel Y Meuret H Thienpont | 2007 | Optical Engineering2007，46，04： | 1 |
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