制备了230 nm远紫外LED封装器件，并研究了氟树脂材料应用于封装器件对光电性能与可靠性的影响，结果表明氟树脂材料封装可使230 nm远紫外LED封装器件光功率提升13%，可达1 mW以上，并未对器件老化性能造成影响。但测试也发现当前230 nm远紫外LED封装器件性能还有所不足，光电转换效率小于0.1%，常温老化216 h光维持率为45%。以230 nm远紫外LED封装器件作为光源进行吸光度检测，测试结果显示当光程为1 cm时硝酸盐氮浓度在0~15 mg/L范围与吸光度成线性相关，可用于水质中硝酸盐氮浓度的检测。

近年来，有机-无机卤化物钙钛矿太阳能电池因其制作工艺简单、成本低、效率高等优点备受关注。问世至今短短十余年间，其光电转化效率已飙升至26%，目前在单异质结光伏电池中排名第三，并且未来仍具有很大的发展潜力。本文依次介绍了杂化钙钛矿材料的结构与性质，以及钙钛矿太阳能电池常见的器件结构演化过程，重点总结了近几年来在利用缺陷钝化策略提高光电转化效率方面取得的最新研究成果，最后阐述了钙钛矿太阳能电池面临的挑战并对其未来商业化前景进行了展望。

Graphene and related two-dimensional materials have attracted great research interests due to prominently optical and electrical properties and flexibility in integration with versatile photonic structures. Here, we report an in-fiber photoelectric device by wrapping a few-layer graphene and bonding a pair of electrodes onto a tilted fiber Bragg grating (TFBG) for photoelectric and electric-induced thermo-optic conversions. The transmitted spectrum from this device consists of a dense comb of narrowband resonances that provides an observable window to sense the photocurrent and the electrical injection in the graphene layer. The device has a wavelength-sensitive photoresponse with responsivity up to 11.4 A/W, allowing the spectrum analysis by real-time monitoring of photocurrent evolution. Based on the thermal-optic effect of electrical injection, the graphene layer is energized to produce a global red-shift of the transmission spectrum of the TFBG, with a high sensitivity approaching 2.167×10⁴ nm/A². The in-fiber photoelectric device, therefore as a powerful tool, could be widely available as off-the-shelf product for photodetection, spectrometer and current sensor.

研制了一种具有同步时序闭环监控的精密同步机，该同步机输出光同步信号，采用单光纤反馈光模块传输同步信号、基于内插法的时间间隔测量方法，能高精度测量反馈的光同步信号与基准信号的时间差，实现了光同步信号的时序闭环监控，达到的技术指标为同步时序闭环监控误差小于等于250 ps。采用本精密时序闭环监控同步技术一方面可以保证同步信号可靠的送达触发对象，另一方面根据测得的时间差值与设定的时序延时值进行比较，可以获得同步信号经过光传输的固有延时量，从而可以实现精密时序的精确配置要求。

Rare-earth-doped upconversion (UC) materials are ideal candidates for solar photovoltaic conversion and NIR response devices due to their unique spectral conversion properties. However, their low efficiency remains a tremendous challenge for practical applications. Here, we constructed an efficient NIR light-responsive device by coating a Si-photoresistor with a transparent gel consisting of UC powders and an organic polymer matrix. We show that reasonable introduction of alkali metal ions (Na+, K+, and Cs+) into the lattice of UC crystals results in the improvement of photoelectricity conversion efficiency, due to the high crystallinity and surface reconstruction caused by alkali metal ion doping.