Artificial lighting consumes almost one-fifth of global electricity. As an efficient solid-state lighting technology, white light-emitting diodes (WLEDs) have received increasing attention. However, the white luminescence of the traditional WLEDs comes from multi-component emitters, which leads to complex device structure and unstable emitting color. Therefore, developing single-component materials with white-light electroluminescence is of significance for artificial lighting applications. Here, we fabricate single-component white-light electroluminescence devices based on an aromatic carbon nitride material and improve the performance of WLEDs by adjusting the carrier transport. The carbon nitride LEDs emit warm-white light, of which color coordinates and color temperature are (0.44, 0.52) and 3700 K. The optimized LEDs display a very low turn-on voltage of 3.2 V and achieve a milestone in the maximum luminance and external quantum efficiency of 1885 cd m⁻² and 1.20%. Our findings demonstrate the low-cost carbon nitride materials have promising potential for single-component WLEDs application.

人工照明消耗了全球近五分之一的电力。作为一种高效的固态照明技术，白光发光二极管（WLED）越来越受到关注。然而，传统白光发光二极管的白光来自多组分发射器，导致器件结构复杂，发光颜色不稳定。因此，开发具有白光电致发光的单组分材料对于人工照明应用具有重要意义。在这里，我们制造了基于芳香族氮化碳材料的单组分白光电致发光器件，并通过调整载流子传输来提高 WLED 的性能。氮化碳 LED 发出暖白光，其色坐标和色温分别为 (0.44, 0.52) 和 3700 K。^-2和 1.20%。我们的研究结果表明，低成本氮化碳材料在单组分 WLED 应用中具有广阔的潜力。