ArticleSmall methods2026
Halide-Gradient Sidewall Heterojunctions for Lateral Charge Confinement in Perovskite Single Crystal x-ray Detectors.
Article in Small methods, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Halide perovskite single crystals are promising active materials for direct x-ray detectors because of their strong x-ray absorption, efficient charge transport, and solution-processable crystal growth. However, in thick single-crystal detectors, lateral side surfaces can act as conductive leakage pathways, increasing dark current, inducing baseline drift, and generating transient overshoot and undershoot during x-ray irradiation. Previous passivation and heterojunction strategies have mainly focused on metal-semiconductor interfaces, leaving side-surface transport pathways insufficiently controlled. Here, a selective side-surface ion-exchange strategy is developed to construct halide-gradient sidewall heterojunctions in MAPbBr
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