| 학회 |
한국고분자학회 |
| 학술대회 |
2021년 가을 (10/20 ~ 10/22, 경주컨벤션센터) |
| 권호 |
46권 2호 |
| 발표분야 |
콜로이드 및 분자조립 부문위원회 Ⅰ,Ⅱ |
| 제목 |
Cadmium-passivated perovskite nanocrystals for efficient blue light emitting diodes |
| 초록 |
Next-generation electroluminescent displays require efficient and stable red, green and blue (RGB) light-emitting diodes (LEDs) with low cost, excellent color purity and flexibility, for which perovskites-based LEDs (PeLEDs) are a promising candidate. Among the three RGB colors, the low efficiencies and poor stability of blue PeLEDs is the major hurdle to their commercial application. Here, we report a combined surface engineering strategy incorporating a simple hot injection method with one pot synthesis for surface passivation of cadmium ions (Cd2+) into blue-emissive all inorganic perovskite nanocrystals (PNCs). When combined with conventional didodecyldimethylammonium bromide (DDAB) ligand engineering, the optimized CsPbBr2Cl PNCs containing 0.2% Cd show improved photoluminescence quantum yield (PLQY; 66.8 %) and ambient stability, compared to the neat PNCs (25.5%) at an emission wavelength of 475 nm. PeLEDs using this optimized PNC show a luminance of 51 cd/m2 and EQE of 3.71%. |
| 저자 |
정우현1, 장지원1, 박성흠2, 최효성1, 이보람2
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| 소속 |
1한양대, 2부경대 |
| 키워드 |
perovskite nanocrystals; blue light emitting diode; metal passivation; metal doping
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| E-Mail |
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