Perovskite Single Crystal Optoelectronic Devices

Perovskite single crystals have emerged as a premier platform for next-generation optoelectronic devices, combining exceptional charge transport properties with low defect densities and high environmental stability. Their ordered lattice and reduced grain-boundary scattering yield long carrier diffusion lengths, high carrier mobility and ultralow trap densities, all of which translate into enhanced photovoltaic, photodetector and light-emitting performance. Advances in controlled crystallisation techniques have enabled the fabrication of wafer-scale and flexible single-crystal membranes, paving the way for devices with record responsivities, external quantum efficiencies and operational stability. The intrinsic tunability of halide composition and dimensionality—extending from three-dimensional structures to two-dimensional layered variants—allows for precise control of bandgap, absorption spectrum and exciton binding energy. In turn, this versatility supports a broad spectrum of applications, from high-efficiency solar cells that harvest below-bandgap photons to photodetectors capable of X-ray detection and on-chip light-emitting diodes. Ongoing efforts focus on refining nucleation control, minimising trap formation and integrating single-crystal films into scalable device architectures, with particular emphasis on lateral-structure designs and flexible form factors.

Research from Nature Portfolio

Recent studies have demonstrated an optofluidic crystallithography approach in which laser‐induced local supersaturation steers the growth of perovskite single crystals, enabling rapid printing of arbitrarily shaped, high-quality halide perovskite crystals at speeds exceeding 100 µm s⁻¹. This method offers precise spatiotemporal control over defect density and surface morphology, and it can be extended to other crystallisable materials under laser-directed supersaturation. Building on controlled growth strategies, a lateral-structure perovskite crystal solar cell design achieved over 11 % power conversion efficiency combined with remarkable thermal and operational stability. By optimising electrode contacts and surface treatments, these devices showed no performance degradation after hundreds of hours at maximum power point under one-sun illumination. Further, planar photodetectors fabricated on the (100) facet of methylammonium lead triiodide single crystals exhibited up to 10²-fold higher responsivity and nearly 10³-fold faster response speeds compared to polycrystalline counterparts, owing to reduced trap densities and extended carrier lifetimes. Together, these works illustrate the transformative impact of precise crystallisation and device engineering on perovskite single-crystal optoelectronics.

Perovskite Single Crystal Optoelectronic Devices publication trend

The graph below shows the total number of articles in perovskite single crystal optoelectronic devices across all publications each year (not limited to Nature Index journals).

Technical terms

Perovskite: A class of materials with the general formula ABX₃, where A and B are cations and X is an anion, notable for their versatile optoelectronic properties.

Single crystal: A continuous crystal lattice without grain boundaries, offering superior charge transport and reduced trap states compared to polycrystalline films.

Carrier mobility: A measure of how rapidly charge carriers (electrons or holes) move through a semiconductor under an electric field.

Trap density: The concentration of defect sites in a crystal that can capture charge carriers, reducing device performance.

Carrier diffusion length: The average distance a charge carrier travels before recombination, indicative of material quality.

External quantum efficiency (EQE): The ratio of collected charge carriers to incident photons, reflecting device sensitivity.

Supersaturation: A state in which a solution holds more dissolved material than it would under equilibrium, driving crystal nucleation and growth.

References

1. Optofluidic crystallithography for directed growth of single-crystalline halide perovskites. Nature Communications (2024).
2. Efficient lateral-structure perovskite single crystal solar cells with high operational stability. Nature Communications (2020).
3. High-Performance Planar-Type Photodetector on (100) Facet of MAPbI3 Single Crystal. Scientific Reports (2015).
4. Growth of centimeter-scale perovskite single-crystalline thin film via surface engineering. Nano Convergence (2020).
5. Recent Progress in Single‐Crystalline Perovskite Research Including Crystal Preparation, Property Evaluation, and Applications. Advanced Science (2017).
6. Recent progress of two‐dimensional lead halide perovskite single crystals: Crystal growth, physical properties, and device applications. EcoMat (2020).
7. Multi-inch single-crystalline perovskite membrane for high-detectivity flexible photosensors. Nature Communications (2018).
8. Wafer-scale single-crystal perovskite patterned thin films based on geometrically-confined lateral crystal growth. Nature Communications (2017).
9. Thin single crystal perovskite solar cells to harvest below-bandgap light absorption. Nature Communications (2017).