What does this research mean for the field?

2D and quasi-2D lead-free halide double perovskites are promising, environmentally stable, and low-toxicity alternatives for optoelectronic devices, though realizing their full potential requires overcoming challenges like indirect bandgaps and limited carrier mobilities through structural and compositional engineering. Novelty: ClaimNovelty.SYNTHESIS. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

Synthesize recent advances in the structural design, synthesis, and optoelectronic properties of 2D and quasi-2D lead-free halide double perovskites while addressing key operational bottlenecks.

September 3, 2026Frontiers of OptoelectronicsOpen Access

Structure-property relationships in 2D/quasi-2D lead-free halide double perovskites for optoelectronic devices

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Synthesize recent advances in the structural design, synthesis, and optoelectronic properties of 2D and quasi-2D lead-free halide double perovskites while addressing key operational bottlenecks.
Reviewed dimensional engineering strategies, focusing on Ruddlesden–Popper and Dion–Jacobson phases incorporating monovalent and trivalent cations.
Evaluated chemical and physical mitigation techniques including compositional alloying, halide mixing, defect passivation, and hybrid device architectures.
Dimensional engineering provides enhanced moisture resistance and tailored quantum confinement alongside tunable bandgaps and pronounced excitonic effects.
Material performance remains restricted by indirect bandgaps, low charge-carrier mobility, and defect trap states that require chemical passivation and structural optimization.
Integration of computational screening with targeted experimental synthesis establishes a viable route toward scalable, flexible, and neuromorphic optoelectronic applications.

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Implication

Review demonstrates structural engineering and defect mitigation strategies in two-dimensional lead-free halide double perovskites, highlighting their viability for sustainable optoelectronic devices.

Cite This Study

Yang et al. (2026) studied this question.

synapsesocial.com/papers/6a99355b636c6408cfa7d7b2 https://doi.org/10.2738/foe.2027.0001

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Structure-property relationships in 2D/quasi-2D lead-free halide double perovskites for optoelectronic devices

Key Points

Discussion

Implication

Cite This Study

Structure-property relationships in 2D/quasi-2D lead-free halide double perovskites for optoelectronic devices

Key Points

Discussion

Implication

Cite This Study

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