Cracking the Quantification Challenge in Luminescent Material R&D: How Jingyi Optoelectronics’ Fluorescence Quantum Yield Analyzer Achieves ≤1% Measurement Accuracy  

In both R&D and mass-production stages of luminescent materials, accurate measurement of quantum yield has long been a critical bottleneck hindering progress for numerous teams: precious perovskite crystals and custom-designed biofluorescent probes are often rendered unusable after destructive testing; conventional instruments require repeated calibration against reference standards—wasting substantial time; and traceable data required for publications or quality control frequently demand multiple rounds of verification before use. Many small- and medium-sized teams—even forego precision requirements altogether due to prohibitively high costs of imported equipment. To address this industry-wide challenge, Jingyi Optoelectronics has independently developed a fluorescence quantum yield analyzer—a cost-effective, domestically engineered solution enabling quantitative performance evaluation across all luminescent material scenarios.  

Many assume measuring light efficiency is inherently complex—but this system’s core principle is analogous to maintaining a “photon income-and-expenditure ledger.” It employs the industry-recognized absolute measurement method, leveraging a specially designed integrating sphere to capture photons from all angles. Crucially, no reference standard is needed at any stage—ensuring fully traceable results directly output by the system. The measurement comprises two sequential steps: First, the total number of incident photons is recorded under blank (sample-free) conditions—effectively establishing the “incoming photon count.” Second, the sample is introduced, and the system simultaneously records both (a) the number of unabsorbed photons remaining after excitation and (b) the number of fluorescent photons emitted by the sample upon excitation—equivalent to quantifying “unconsumed” and “converted-output” photons, respectively. The absolute fluorescence quantum yield is then calculated directly using the formula: *emitted photons ÷ (total incident photons − unabsorbed photons)*. The entire process is non-contact and non-destructive—even milligram-scale, irreplaceable research samples remain fully intact, eliminating concerns about sample loss.  

At the heart of this system lies a 3.3-inch integrating sphere fabricated from Spectralon® material—functioning as a “complete photon collection chamber.” Its interior features a high-reflectance coating that ensures photons emitted in any direction undergo multiple internal reflections before being fully captured by the detector. This eliminates the directional bias inherent in conventional instruments—which typically collect fluorescence from only a single angle—and constitutes the fundamental reason why this system achieves quantum yield measurement uncertainty of ≤1%.  

To meet diverse user requirements, the system offers two distinct testing modes—both operated entirely via intuitive software, with zero manual optical alignment or complex adjustments:  
- **Mode I: Rapid Quantification Mode**, optimized for routine quality control and publication-ready data generation. Users simply load the sample and select the excitation wavelength—the instrument automatically executes full-cycle photon counting and calculation, delivering absolute quantum yield values suitable for academic publication or quality assessment within 3–5 minutes. No reference-standard calibration is required, drastically reducing pre-measurement preparation time.  
- **Mode II: Full-Spectrum Sweep Mode**, tailored for novel material development. Users may define excitation wavelength step sizes ranging from 1 nm to 5 nm, scanning across a user-specified spectral range to map quantum yield variation. The result is a comprehensive “wavelength vs. quantum yield” curve—visually revealing the material’s luminescent behavior under varied excitation conditions. This mode is especially valuable for characterizing emerging materials such as low-dimensional semiconductors and metal–organic frameworks (MOFs).  

Unlike conventional fluorescence spectrometers—bulky and poorly adaptable—Jingyi Optoelectronics’ photoluminescence (PL) detection system covers the full spectral range from 300 nm to 1650 nm, enabling seamless characterization of ultraviolet-, visible-, and near-infrared-emitting materials in a single measurement. It concurrently outputs multiple core parameters—including quantum yield, absorption ratio, incident photon count, and emitted photon count—eliminating the need for multiple instruments or repeated setups. Furthermore, the system accommodates diverse sample forms: liquids, powders, and thin films alike. Whether it’s fluorescent probe solutions in biomedical applications, OLED thin films in display technology, or perovskite powders in new energy research, all are directly compatible—requiring no custom fixtures.  

This system is already deployed across multiple sectors:  
- Biomedical research teams employ it to screen highly emissive immunodetection probes—cutting in vitro diagnostic reagent development timelines significantly;  
- Display and lighting enterprises utilize it for batch-quality inspection of quantum dots and OLED materials—traceable measurement data improves yield control efficiency by over 40%;  
- New energy R&D teams apply it to characterize perovskite materials’ energy-conversion efficiency—accelerating formulation optimization;  
- University and research institute laboratories leverage it for performance validation of low-dimensional semiconductors and MOFs—its accessible procurement cost empowers even small research groups with high-precision metrology capabilities.  

As domestic innovation accelerates in advanced materials, new energy, and biomedicine, accurate, affordable analytical instrumentation has become a foundational enabler of industrial advancement. Jingyi Optoelectronics’ fluorescence quantum yield analyzer—built on proprietary high-precision measurement technology and highly adaptable system design—delivers a fully import-substitutable, domestically manufactured solution for R&D and production labs alike. It truly fulfills the mission of placing core metrology tools at the service of industrial innovation.  

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