Publications by authors named "Giedrius Degutis"
The desire to commercialize perovskite solar cells continues to mount, motivating the development of scalable production. Evaluations of the impact of open-air processing have revealed a variety of physical changes in the fabricated devices─with few changes having the capacity to be functionalized. Here, we highlight the beneficial role of ambient oxygen during the open-air thermal processing of metastable γ-CsPbI-based perovskite thin films and devices.
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- The black perovskite phase of CsPbI is highly suitable for optoelectronic uses but suffers from instability, quickly transitioning to a non-functional yellow phase when exposed to ambient conditions.
- Researchers incorporated a PbI-based microstructure into the CsPbI thin films using coarse photolithography, which helps prevent moisture-related degradation and significantly enhances the long-term stability of the black phase for over 2.5 years in dry conditions.
- This innovative stabilization approach allows unencapsulated CsPbI photodetectors to operate stably in ambient conditions, offering new insights into phase destabilization in these devices and presenting a novel solution distinct from previous methods.
We demonstrate a simple and effective approach to control the diameter of ultrathin ZnO nanowires with high aspect ratios and high densities over large areas. Diblock copolymer-based nanoparticle arrays exhibiting a high degree of hexagonal order and offering easy control of particle size (typically 1-10 nm) and interparticle spacing (25-150 nm) are utilized as nanocatalysts for the subsequent growth of semiconductor nanowires. The as-grown ZnO nanowires exhibit a single crystal hexagonal wurtzite structure and grow along the [0002] direction.
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