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From Optoelectronics to Radiation Detection: Light Yield Challenges in Perovskite Scintillators
Matteo L Zaffalon1,2, Luca Gironi2,3, Martin Nikl4
1Dipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca, Via R. Cozzi 55, 20125 Milan, Italy.
ACS Energy Letters
|January 16, 2026
Summary
Accurately measuring light yield (LY) in lead halide perovskite (LHP) thin-film scintillators is challenging due to energy loss and optical effects. This work proposes guidelines for reliable LY determination in these advanced radiation detection materials.
Area of Science:
- Materials Science
- Nanotechnology
- Radiation Detection
Background:
- Lead halide perovskites (LHPs) are promising nanomaterials for next-generation scintillators.
- Thin-film and nanocrystal formats offer advantages like scalability and tunable emission.
- Accurate light yield (LY) quantification is crucial but challenging for these emerging materials.
Purpose of the Study:
- To address the critical methodological limitations in characterizing LY for LHP scintillators.
- To highlight the difficulties in LY measurement for thin films compared to bulk crystals.
- To propose practical guidelines for accurate and reproducible LY determination.
Main Methods:
- Review of theoretical frameworks for LY.
- Analysis of limitations in traditional bulk scintillator characterization protocols.
- Discussion of energy deposition modeling and optical loss mechanisms in thin films.
Main Results:
- Current LY characterization methods are inadequate for thin-film LHP scintillators.
- Reduced energy deposition, optical losses, and geometry-dependent light extraction complicate LY measurements.
- Existing protocols often distort LY values, hindering material comparison.
Conclusions:
- Standardized, accurate LY measurement protocols are needed for LHP thin-film scintillators.
- Precise energy deposition modeling and consideration of optical effects are essential.
- Guidelines are proposed to enable fair material comparison and advance radiation detection technology.
