Absolute PL Quantum Yield Testing System

Absolute PL Quantum Yield Testing System

Absolute PL Quantum Yield Testing SystemLuQY Pro was developed by scientists from QYB Quantum Yield Berlin GmbH, a spin off company of the Helmholtz Center (HZB) in Berlin, Germany.The team set a century record of 29.15% efficiency for perovskite/silicon stacked solar cells in 2020, and the corresponding article was published inScienceUp there（DOI: 10.1126/science.abd4016）.

Used for testing solar cells LEDsWaiting for photoelectricThe device'sAbsolutePL photoluminescence spectrum, and calculate PLQY photoluminescence quantum yield, QFLS quasi Fermi level splitting, etc. The device is designed to be compact, easy to operate, and can be placed inside a glove box.

l Technical features:

PLQY sensitivity ≥ 1E-5

Absolute luminous flux measurement

AbsolutePL spectrum detection

Direct PLQY quantum yield calculation

Direct QFLS quasi Fermi level splitting calculation

Ideal factor calculation

Pseudo JV construction

Laser intensity scanning measurement

Automatic continuous laser intensity adjustable from 0.002 to 2 "suns"

l Software operation interface：

The software displays the luminescence spectrum of the measured sample under various excitation conditions.

*Upper window: Display the emission spectrum, camera field of view, and calculate the values of PLQY (LuQY) and QFLS.

*Lower window: Sample information(“1” -increaseQFLS calculation credibility)Adjust excitation and testing settings(“2”~“4”).

The software has adoptedtwo kindsThe QFLS quasi Fermi level splitting calculation method will automatically select the highly reliable method for each measurement. This can depend on the emission type (e.g. wide bandgap emission) and whether the user provides light absorption data.

l Direct QFLS quasi Fermi level splitting prediction:

-Not requiring specified data for samples, low credibility

-Reliable QFLS quasi Fermi level splitting prediction for low bandgap emission and lowStokes displacementlaunch

l Fine QFLS quasi Fermi level splitting prediction:

-Provide sample specific absorption data to increase the credibility of QFLS quasi Fermi level splitting

-Optical bandgap, short-circuit current density Jsc@STC The quantum efficiency of EQE at 532nm can be manually inputted or extracted from EQE/absorption spectra

-Providing sample data can better achieve set point excitation settings (such as 1sun equivalent laser excitation) and improve the accuracy of QFLS quasi Fermi level splitting prediction.

l Technical Specifications

Photon excitation wavelength:520 nm

Laser power:7 μW – 70 mW

Adjustable photon excitation intensity (equivalent current):1.8 μA to 18 mA

Photon excitation spot (optional):0.5 cm²

Laser spot position: dual axis adjustable

Spectral measurement range:550 - 10000 nm

Lower limit distinguishable luminescence quantum yield:1E-5

Integral time:1 ms – 35 min

Spectral sampling interval:1 nm

Signal to Noise Ratio:600:1

Sample fixture: customizable (sample size up to)30mmX30mmX10mm）

Equipment size:220 mm x 300 mm x 120 mm

Weight:5.2 kg

Note:LuQY Pro laser intensity calibration isAbsolute Photon number basiscertified reference solar cells from Fraunhofer ISE CalLab PV Cells.LuQY Pro spectral sensitivity calibration isAbsolute The photon number is based on lamps with known luminous flux traceable to NIST.

References:

Publications Using LuQY Pro/LuQYMeasurement System

[1]

L. Jiaet. al., „Efficient perovskite/silicon tandem with asymmetric self-assembly molecule“,Nature, July 2025, doi:10.1038/s41586-025-09333-z.

[2]

Z. Jiaet al., “Efficient near-infrared harvesting in perovskite–organic tandem solar cells,”Nature, vol. 643, no. 8070, pp. 104–110, Jul. 2025, doi:10.1038/s41586-025-09181-x.

[3]

H. Chenet al., “Improved charge extraction in inverted perovskite solar cells with dual-site-binding ligands,”Science, vol. 384, no. 6692, pp. 189–193, Apr. 2024, doi:10.1126/science.adm9474.

[4]

J. Liet al., “Enhancing the efficiency and longevity of inverted perovskite solar cells with antimony-doped tin oxides,”Nature Energy, vol. 9, no. 3, pp. 308–315, Mar. 2024, doi:10.1038/s41560-023-01442-1.

[5]

Z. Weiet al., “Surpassing 90% Shockley–QueisserV_OClimit in 1.79 eV wide-bandgap perovskite solar cells using bromine-substituted self-assembled monolayers,”Energy Environ. Sci., vol. 18, no. 4, pp. 1847–1855, 2025, doi:10.1039/d4ee04029e.

[6]

X. Tangetal., „Enhancing the efficiency and stability of perovskite solar cells via a polymer heterointerface bridge“,Nat. Photon., June 2025, doi:10.1038/s41566-025-01676-3.

[7]

Y. Yuan, G. Yan, S. Akel, U. Rau, and T. Kirchartz, “Deriving mobility-lifetime products in halide perovskite films from spectrally- and time-resolved photoluminescence,” Apr. 16, 2025,Science Advances. doi:10.1126/sciadv.adt1171.

[8]

E. Alviantoet al., „Industry‐Compatible Fully Laminated Perovskite‐CIGS Tandem Solar Cells with Co‐Evaporated Perovskite“,Advanced Materials, July 2025, doi:10.1002/adma.202505571.

[9]

O. Er-rajiet al., “Tailoring perovskite crystallization and interfacial passivation in efficient, fully textured silicon tandem solar cells,”Joule, vol. 0, no. 0, Jul. 2024, doi:10.1016/j.joule.2024.06.018.

[10]

H. Lianget al., “29.9%-efficient, commercially viable perovskite/CuInSe2 thin-film tandem solar cells,”Joule, vol. 7, no. 12, pp. 2859–2872, Dec. 2023, doi:10.1016/j.joule.2023.10.007.