Flexible electronics are expected to play a key role in connecting human lives with versatile smart electronic devices due to their adaptability to different shapes, surfaces, and even the human body. However, heat management issues found in most flexible devices due to the low thermal conductivity of conventional plastic or paper substrates become significant for large-scale integration or high-temperature applications. In this study, we employed high thermal conductivity nanopaper composed of two-dimensional (2D) hexagonal boron nitride nanosheets and one-dimensional nanofibrillated cellulose to form a flexible deep-ultraviolet photodetector demonstrating superior photodetectivity of up to 8.05 × 10¹⁰ cm Hz^1/2/W, a short response time of 0.267 s, and excellent flexible durability featuring repeatable ON/OFF photoswitching over 200 bending cycles. Because the boron nitride paper has a high thermal conductivity of 146 W/mK, which is three orders of magnitude larger than plastic or paper substrates, the photodetectors can work at high temperatures of up to 200 °C. The boron nitride paper-based strategy described herein suggests a path for improving heat dissipation in flexible electronics and achieving high-performance deep-ultraviolet photodetectors, which can be applied in wearable applications.

柔性电子产品因其对不同形状，表面甚至人体的适应性，有望在连接人类生活与多功能智能电子设备方面发挥关键作用。但是，由于常规塑料或纸质基材的低导热性，在大多数柔性设备中发现的热管理问题对于大规模集成或高温应用而言变得尤为重要。在这项研究中，我们采用了由二维（2D）六边形六方氮化硼纳米片和一维纳米原纤化纤维素组成的高导热率纳米纸，形成了一种柔性的深紫外光电探测器，展示了高达8.05×10 ¹⁰  cm Hz ^{1 / 2个}/W，0.267 s的短响应时间，以及出色的柔性耐用性，可在200个弯曲周期内进行可重复的ON / OFF光开关。由于氮化硼纸的导热系数高达146 W / mK，比塑料或纸质基材的导热系数大三个数量级，因此光电探测器可以在高达200°C的高温下工作。本文所述的基于氮化硼纸的策略提出了一种改善柔性电子器件中的散热并实现高性能深紫外光电检测器的途径，该方法可应用于可穿戴应用。