Time-Resolved Photoluminescence Studies of Transparent Hybrid Nanomaterials for Tunable Energy-Efficient Light Emitting Materials and Devices

消费者和工业界都在寻找安全、耐用、节能的传统白炽灯泡替代品。虽然紧凑型荧光灯（cfl）相对高效，但它们含有汞，在处理和灯泡破裂的情况下需要特殊处理。发光二极管（led）是一种更安全、更高效、更持久的cfl替代品。然而，制造高效的白光led既复杂又昂贵。准白光led的制造目前是基于将不同颜色的led组合在一起，或者使用不同荧光粉的混合物（通常含有昂贵的稀土元素）。我们设计并制备了低成本高效率的有机-纳米晶体混合材料，其照明可以调谐到可见光范围内的任何颜色，包括纯白光，并且可以从液体（即溶液）或固体（即粉末）加工成发光结构和器件。所获得的杂化纳米材料作为单一的照明实体，而不是混合物，并提供均匀和均匀的白光发射。

Consumers and industry are seeking safe, durable, energy-efficient alternatives to traditional incandescent light bulbs. Although compact fluorescent lamps (CFLs) are comparatively efficient, they contain mercury, which requires special handling for disposal and in the case of bulb breakage. Light emitting diodes (LEDs) are a safer, more efficient and longer lasting alternative to CFLs. However, manufacturing efficient white LEDs is complicated and expensive. The fabrication of quasi-white LEDs is currently based on combining LEDs of different colours, or using a mixture of different phosphors (often containing expensive rare-earth elements). We designed and prepared low-cost high-efficiency organic-nanocrystal hybrid material whose illumination can tuned to any colour in the visible range, including pure white light, and which can be processed into light emitting structures and devices from liquid (i.e. solution) or solid (i.e. powder). The obtained hybrid nanomaterial acts as a single illumination entity, rather than a mixture, and provides a homogeneous and uniform white light emission.