Publication date: 5th November 2025
Metal-halide perovskites (MHP) are highly promising optoelectronic materials due to their exceptional properties and versatile fabrication methods. These materials are crucial for solar cells and optoelectronic devices, as well as quantum emitters.1-2
Thermal evaporation has emerged as a pivotal approach to achieve precise control over film thickness, composition, and interfacial quality, enabling stress-free deposition, surface modification, and scalable device fabrication—key parameters for advancing perovskite optoelectronics.
In this talk, I will present how we have addressed the challenges of scalability and reproducibility in perovskite solar cell (PSC) fabrication—both critical for sustainable large-scale deployment. We demonstrate that a sixfold increase in deposition speed can be achieved while preserving film quality and power conversion efficiency. This accelerated co-evaporation route enables cost-effective, annealing-free PSC production, greatly simplifying the manufacturing workflow.3
Building on the capability of thermal evaporation to deliver films with nanometer-level thickness control and high uniformity, we have extended this approach to design perovskite-based Multiple Quantum Wells (MQWs).4 These engineered heterostructures allow tuning of carrier confinement, excitonic coupling, and quantum interference phenomena—unlocking new functionalities in light emission, carrier dynamics, and quantum optoelectronic device architectures. MQWs thus represent a transformative platform for tailoring the electronic band structure and achieving unconventional photonic and quantum responses beyond conventional bulk perovskites.⁵
Overall, these advances not only overcome major barriers to scalable PSC production but also open new frontiers in quantum-confined perovskite optoelectronics, underscoring the versatility and technological potential of thermally evaporated perovskite materials for next-generation energy and photonic applications.
References:
1) Min, H., et al., Nature, 2021. 598, 444.; Yoo, J.J., et al., Nature, 2021. 590 587.
2) J. Li et al., Joule 2020, 4, 1035; H.A. Dewi et al., Adv. Funct. Mater. 2021, 11, 2100557; J. Li et al., Adv. Funct. Mater. 2021, 11, 2103252;
3) Dewi et al. ACS Energy Lett. 2024, 9, 4319−4322; Dewi et al, ACS Energy Materials 2025
4) Advanced Materials 2021, 33, 2005166; L. White et al. ACS Energy Lett. 2024, 9, 83;
5) L. White, ACS Energy Lett. 2024, 9, 4450. L. White, ACS Energy Lett. 2024, 9, 4450.
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