The biggest bottleneck delaying the practical applications of organic thermoelectric devices is the lack of high-performance n-type semiconductors with high air stability. Herein, we report an n-type metal–organic coordination complex (Br–C₆H₄–NH₂)₂CuBr₂. This material exhibits an exceptionally high room-temperature electrical conductivity of >3990 S cm⁻¹, leading to a giant power factor of >1589 μW m⁻¹ K⁻², which is the highest value for organic thermoelectric materials. Besides, the (Br–C₆H₄–NH₂)₂CuBr₂ film retained 87.8 per cent of the original electrical conductivity after being stored in air for 109 days, which is a record-breaking value for an n-type organic TE material. More surprisingly, we find that this substance does not decompose even after immersion in pure water for 405 days. We demonstrate that the giant power factor mainly arises from an ultrahigh electrical conductivity, which mainly comes from the efficient electron transfer from Br–C₆H₄–NH₂ to CuBr₂. This work opens a new era for solving the long-standing key challenges of achieving air-stable and high-performance n-type organic thermoelectric materials.

中文翻译：

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n 型金属-有机电荷转移络合物中的巨大功率因数和高空气稳定性

阻碍有机热电器件实际应用的最大瓶颈是缺乏空气稳定性高的高性能n型半导体。在此，我们报告了一种 n 型金属有机配位络合物 (Br–C ₆ H ₄ –NH ₂ ) ₂ CuBr ₂。^{这种材料表现出 >3990 S cm -1}的超高室温电导率，导致 >1589 μW m ^-1 K ^-2的巨大功率因数，这是有机热电材料的最高值。此外，(Br–C ₆ H ₄ –NH ₂ ) ₂ CuBr ₂在空气中存放 109 天后，该薄膜仍保留了原始导电率的 87.8%，这是 n 型有机 TE 材料的创纪录值。更令人惊奇的是，我们发现这种物质即使在纯水中浸泡405天也不会分解。我们证明了巨大的功率因数主要来自超高电导率，这主要来自从 Br–C ₆ H ₄ –NH ₂到 CuBr ₂的有效电子转移。这项工作为解决实现空气稳定和高性能 n 型有机热电材料的长期关键挑战开辟了新纪元。