Research Highlights

Explore these overviews of our recent research projects.

2020 Research Highlights

Charge Carrier Transport through Ferroelastic Twin Boundaries in Halide Perovskite »

The twin boundaries formation does not decrease the device efficiency but can make perovskite electronic devices more flexible.

May 5, 2020

2019 Research Highlights

Efficient Blue Perovskite Light-Emitting Diodes via Photoluminescence Enhancement »

Matching electron and hole current achieves record external quantum efficiency of 11% and brightness of 9040 cd/m2 in the YCl3 incorporated blue perovskite light-emitting diodes.

Dec. 10, 2019 

Enhancing Electron Diffusion Length in Narrow Bandgap Perovskites for Efficient All-Perovskite Tandem Solar Cells »

This work provides a promising method to enhance the optoelectronic properties of narrow-bandgap perovskites, which unlock the potential of high-efficiency, low-cost, and solution-processable perovskite-perovskite tandem solar cells.

Oct. 3, 2019

Perovskite Heterojunction Quantum Dot Films with Charge-Separating Interface »

Metal halide perovskite semiconductors, with chemical composition ABX3, possess outstanding characteristics for optoelectronic applications, including but not limited to photovoltaics.

June 28, 2019

Tunable Self-Assembling Organic-Inorganic Quantum Wells »

Films deposited by resonant-infrared matrix-assisted pulsed laser evaporation enable transient absorption spectroscopy measurements on oligothiophene-based lead halide perovskites, providing a critical window into excited state dynamics and validating hybrid density functional theory predictions of quantum well alignment between the various inorganic/organic moieties.

May 16, 2019

Conductivity Tuning via Doping with Electron Donating and Withdrawing Molecules in Perovskite CsPbl3 Nanocrystal Films »

Enhanced conductivity for p-type nanocrystal (NC) arrays enables significant improvements to field-effect transistors and phototransistors, which should, in turn, lead to performance improvements in light-detecting applications and solar cells.

May 10, 2019 

Carrier Lifetimes of >1 ms in Sn-Pb Perovskites Enable Efficient All-Perovskite Tandem Solar Cells »

The addition of guanidinium thiocyanate results in marked improvements in the structural and optoelectronic properties of Sn-Pb mixed, low-band gap (~1.25- eV) perovskite films.

May 3, 2019

Enhanced Charge Transport in 2D Perovskites via Fluorination of Organic Cation »

Through fluorine substitution on the para position in phenethylammonium (PEA) to form 4-fluorophenethylammonium (F-PEA), the average phenyl ring centroid−centroid distances in the organic layer become shorter with better aligned stacking of perovskite sheets.

March 18, 2019

2018 Research Highlights

Mechanism of Enhanced Broadband Emission »

Lattice distortion promotes a self-trapped exciton that emits broadband white light with a very high efficiency.

Nov. 7, 2018

Spin-Coherence Time as a Function of Layer Thickness »

In addition to larger structural distortion in 2D layered systems, there is a larger phonon coupling to carriers. These two effects can counterbalance each other to produce the longest live spin-coherence lifetime in a layered system where the layers contain 4 PbI62- octahedra.

Aug. 28, 2018