NUS team demonstrates transparent near-infrared perovskite light-emitting diodes

NUS researchers have developed transparent, near-infrared perovskite light-emitting diodes (LEDs) that could be integrated into the displays of smart watches, smart phones and augmented or virtual reality devices.

A transparent PeLED overlaid across a smart-watch display imagea A transparent PeLED overlaid across a smart-watch display to show high optical transparency and neutral color. b Near-infrared photo showing bright NIR electroluminescence from the transparent PeLED above the smart-watch display. Image from article

These transparent devices are constructed with an ITO/AZO/PEIE/FAPbI3/poly-TPD/MoO3/Al/ITO/Ag/ITO architecture, and offer a high average transmittance of more than 55% across the visible spectral region.

Surface engineering of perovskites can improve stability of perovskite solar cells

Researchers from East China University of Science and Technology and Australia-based Griffith University have examined the effects of surface decoration of perovskites on the stability of resulting perovskite solar cells. They reported that such configurations have shown to be more stable than the untreated surface of perovskites.

The team reported a chelation strategy for surface engineering of CsPbI2Br perovskite, in which dithiocarbamate molecules can be coordinate to surface Pb sites via strong bidentate chelating bonding. Such chelated CsPbI2Br perovskite can realize excellent passivation of surface under-coordinated defects, reaching a power conversion efficiency of 17.03% and an open-circuit voltage of 1.37 V of CsPbI2Br solar cells.

Researchers achieve breakthrough with blue LEDs based on perovskite quantum dots

Research using the Canadian Light Source (CLS) at the University of Saskatchewan could help bring perovskite QDs display technology closer to commercilization.

Quantum dots are nanocrystals that glow, a property that scientists have been working with to develop next-generation LEDs. When a quantum dot glows, it creates very pure light in a precise wavelength of red, blue or green. Conventional LEDs, found in TV screens today, produce white light that is filtered to achieve desired colors, a process that leads to less bright and muddier colors.

Korean researchers win UDC's Innovative Research and Pioneering Technology Award for perovskite transistors study

Researchers from Pohang University of Science and Technology in Korea have received Universal Display Corporation's 2020 Innovative Research and Pioneering Technology Award in Organic Electronics & Display, for their work “High-Performance and Reliable Lead-Free Layered-Perovskite Transistors”. Universal Display (UDC) is a large OLED research company, considered to be a pioneer in field.

In their work, the scientists explain that despite extensive examination of perovskites' potential use in solar cells and light‐emitting diodes, research on their applications in thin‐film transistors (TFTs) has drawn less attention despite their high intrinsic charge carrier mobility. In this study, the universal approaches for high‐performance and reliable p‐channel lead‐free phenethylammonium tin iodide TFTs are reported.

The ’27plus6′ project aims for 33% efficient perovskite-silicon solar cell

The Institute for Solar Energy Research Hamelin (ISFH), the Karlsruhe Institute of Technology (KIT) and the Institute for Materials and Components in Electronics at the University of Hannover, as well as Centrotherm, Singulus, Meyer Burger and Von Ardenne, are involved in a research project aimed at achieving 33%-efficient perovskite-silicon tandem solar cell suitable for mass production.

The new research project is called ’27plus6′ and it brings together the expertise of leading German and Swiss technology companies and research institutes. The consortium said that it aims to achieve the promised conversion efficiency under standard test conditions, and that is also seeking to reach a higher power yield, intended to accelerate industrial implementation.