Effects of thermal treatment on organic-inorganic hybrid perovskite films and luminous efficiency of light-emitting diodes
Effects of thermal treatment on organic-inorganic hybrid perovskite films and luminous efficiency of light-emitting diodes
- 주제(키워드) Thermal treatment Crystallinity Organic-inorganic perovskite Light-emitting diodes Luminous efficiency
- 발행기관 한국물리학회
- 발행년도 2016
- 총서유형 Journal
- UCI G704-001115.2016.16.9.010
- KCI ID ART002144875
- 본문언어 영어
초록/요약
To improve the electroluminescence efficiency of organic-inorganic hybrid perovskite (OIP) films, we need to consider several different types of post-treatments after film formation such as thermal annealing and solvent annealing. Here, we only applied thermal treatment on the film excluding all the other treatments. Then, we analyzed the effects of annealing time tann on crystallinity of methylammonium lead bromide (CH3NH3PbBr3) films and on luminous efficiency of CH3NH3PbBr3-based perovskite light-emitting diodes (PrLEDs). When thermal annealing of CH3NH3PbBr3 films was conducted at 90 C, tann 10 min increased its crystallinity by eliminating residual solvent and completing the conversion of precursor to crystal, but tann > 10 min reduced crystallinity and caused slight sublimation of CH3NH3Br. This was consistent with trend of the luminous efficiency of our PrLEDs that showed the optimum performance at tann ¼ 10 min. These results demonstrate that optimizing tann of CH3NH3PbBr3 films is a simple way to improve the luminous efficiency of PrLEDs by controlling their crystallinity.
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