接近100%!基于PerovSkite的LED具有记录的发光效率,预计将应用于照明,太阳能电池等的领域
- 2019年7月02日 -

9.jpg.

科学家与高端消费电子产品广泛应用的OLED相比,科学家将Perovskite层集成到LED中,基于Perovskite的LED具有较低的制造成本,并且可以发光,具有高色纯度。虽然科学家们之前开发了基于Perovskite的LED,但将电力转化为光线的效率并不像传统OLED那样好。以前由Richard Fried的Camentish University的Richard Creaver教授队开发的混合钙钛矿LED在其内晶结构中的微小缺陷引起的钙钛矿层的损失,他们发光效率限制了它们的发光效率。现在,该团队通过新的研究证明,允许钙钛矿和聚合物形成复合层,可以实现更高的发光效率,接近薄膜OLED的理论效率极限。结果发表于最新的自然光子学。LED器件中的钙钛矿聚合物复合层由二维和三维钙钛矿和绝缘聚合物制成。当在结构上照射超快速激光时,电荷携带能量从二维区域移动到一秒钟内的三维区域。然后,三维区域中的“独立”电荷有效地重新组合并发光。David de博士,纸张的通信作者之一解释:“从二维区域到三维区域的能量转移非常快,并且三维区域的电荷与缺陷隔离聚合物。这些机制可以防止“令人不安”的缺陷,从而防止能量损失。这是第一次科学家在佩罗夫斯基特的产品上实现了这一点。“虽然基于Perovskite的LED已经开始与OLED竞争,但 its stability is poor at present and cannot be used in consumer electronics products for the time being. When perovskite-based LED first appeared, its lifetime was only a few seconds. The half-life of perovskite-based LED in the new study is about 50 hours. Although it has been improved a lot, it is still far from the life requirements required for commercial applications. To achieve this, extensive industrial development plans are needed. David said: "Understanding the degradation mechanism of LED is the key to future improvement." Original title: nearly 100%! The perovskite-based LED has a record luminous efficiency and is expected to be applied to the fields of illumination, solar cells and the like


相关产品