【Introduction】:

The LED electroluminescence external quantum efficiency testing system is a high-precision evaluation device specially designed for accurately measuring the energy conversion efficiency of LED devices. This system integrates advanced spectrometers, high-performance integrating spheres, and precise source meters. Coupled with professional measurement software, it can accurately measure key parameters such as external quantum efficiency, brightness, and electroluminescence wavelength of LEDs. With these detailed data provided by the system, the reserachers can optimize the efficiency of the LED device, thereby promoting the development of high-efficiency and low energy consuming products in the design and production process.

LED external quantum efficiency measurement system

【Advantages】:

This system has a small footprint and stable operation; It can directly obtain the emission spectrum of the device, and other real-time data such as current, voltage, EQE, brightness, and color coordinates. Under different operation modes, it can perform either forward or backward scan, get data such as time-dependent EQE, brightness, spectrum, and color coordinates, thereby obtaining device lifetime data. We can also provide customized hardware and software functions.

Schematic of the software's user interface

【Equipment specifications】:

Detectable spectral range: 300~1100 nm

Spectral resolution: 0.7 nm

Integration time: 8 ms-15 min

Signal to noise ratio: not less than 1000:1 (for full signal)

Voltage process: 200 mV-200 V

Current range: 1 uA-1 A

Schematic representation of test results

【Product applications】:

【1】 Nat Photonics 2016, 10, 699

【2】 Nature 2018, 562, 249

【3】 Nat Commun 2018, 9, 608

【4】 Nat Commun 2019, 10, 3624