Professor Zhang from the Materials College of a certain university once encountered difficulties in the research on the stability of perovskite solar cells: "We needed to monitor the subtle changes in the photoluminescence spectra of perovskite materials in real time to optimize the material formula. However, traditional spectrometers have a resolution of only 1 nm, which cannot capture weak signal differences and the optical path is fixed, making it impossible to conduct in-situ tests. This led to discrete experimental data and we were unable to publish top-tier papers for 3 years. What's more challenging is that the equipment is bulky and cannot be embedded in narrow experimental spaces such as glove boxes, limiting the flexibility of experimental design."
The introduction of the Sefan Photovoltaic Research Grade Fiber Optic Spectrometer completely broke through the research bottleneck. This equipment is equipped with holographic gratings and back-sensing CCD array detectors, with a spectral coverage of 350-1100 nm and a resolution of up to 0.1 nm, a dynamic range of over 1000:1, capable of clearly capturing the weak signals of fluorescence spectra and the differences in material surface components, accurately quantifying the photoluminescence intensity and wavelength shifts, providing precise data support for the stability research of perovskite materials. The flexible fiber design enables remote in-situ sampling, eliminating the need to repeatedly move the samples, and allowing easy insertion into narrow spaces such as glove boxes and reaction vessels. Combined with thermal electric cooling technology, it effectively reduces detector noise, with a signal-to-noise ratio of up to 1000:1, and the experimental data repeatability reaches over 99%.
"The Sefan fiber optic spectrometer is our 'researching tool'!" Professor Zhang happily shared. "With the high sensitivity and in-situ testing capabilities of the equipment, we successfully monitored the spectral change patterns during the aging process of perovskite materials, quickly identified the optimal formula, and shortened the research cycle by 40%. Last year, based on the test data from this equipment, we published 3 top-tier papers and applied for 4 national invention patents, completely getting rid of the reliance on imported research equipment. Moreover, the equipment supports multi-channel synchronous acquisition and can be linked with other equipment such as electron microscopes, with a time alignment error of less than 0.1 seconds, significantly improving the experimental efficiency."
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