最新評論

daite1978 2018-11-10 21:24

鈣鈦礦基LED

zhoutao 2018-11-10 21:57

鈣鈦礦基LED

tassy 2018-11-11 00:17

可與有機(jī)LED應(yīng)用于顯示

dushunli 2018-11-11 00:20

發(fā)光效率創(chuàng)記錄！

redplum 2018-11-11 00:25

好牛逼啊

mang2004 2018-11-11 00:26

摘要： '}53f2%gKa  
Perovskite-based optoelectronic devices are gaining much attention owing to their remarkable performance and low processing cost, particularly for solar cells. However, for perovskite light-emitting diodes, non-radiative charge recombination has limited the electroluminescence efficiency. Here we demonstrate perovskite–polymer bulk heterostructure light-emitting diodes exhibiting external quantum efficiencies of up to 20.1% (at current densities of 0.1–1 mA cm−2). The light-emitting diode emissive layer comprises quasi-two-dimensional and three-dimensional (2D/3D) perovskites and an insulating polymer. Photogenerated excitations migrate from quasi-2D to lower-energy sites within 1 ps, followed by radiative bimolecular recombination in the 3D regions. From near-unity external photoluminescence quantum efficiencies and transient kinetics of the emissive layer with and without charge-transport contacts, we find non-radiative recombination pathways to be effectively eliminated, consistent with optical models giving near 100% internal quantum efficiencies. Although the device brightness and stability (T50 = 46 h in air at peak external quantum efficiency) require further improvement, our results indicate the significant potential of perovskite-based photon sources.

likaihit 2018-11-11 00:26

這是什么原理

bairuizheng 2018-11-11 00:39

：“從二維區(qū)域到三維區(qū)域的能量遷移發(fā)生得非常快，且三維區(qū)域內(nèi)的電荷與聚合物的缺陷相互隔離，這些機(jī)制可以防止缺陷‘搗亂’，從而防止能量損失。

劉明歡聰慧 2018-11-11 07:09

鈣鈦礦層整合進(jìn)發(fā)光二極管（LED）內(nèi)，得到的產(chǎn)品內(nèi)部發(fā)光效率接近創(chuàng)紀(jì)錄的100%，可與最好的有機(jī)LED（OLED）相媲美，未來有望應(yīng)用于顯示、照明、通信及下一代太陽能電池領(lǐng)域。

zhangyuqian1 2018-11-11 07:53

厲害了啊