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Tunable Self-Assembling Organic-Inorganic Quantum Wells

May 16, 2019

Films deposited by resonant-infrared matrix-assisted pulsed laser evaporation (RIR-MAPLE) 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.

Scientific Achievement

We show uniquely versatile excited-state behavior in complex hybrid perovskite quantum-well systems, prepared using resonant-infrared matrix-assisted pulsed laser evaporation.

Significance and Impact

The work demonstrates a new paradigm of combining theoretical modeling, organic synthesis, RIR-MAPLE, and spectroscopy in the rational design and tuning of complex hybrid perovskites.

Research Details

  • Density functional theory predicts organic-inorganic energy level alignment and guides synthesis
  • Organic synthesis provides targeted organics for the hybrid
  • RIR-MAPLE enables depositing the complex hybrid films
  • Unique photophysics from targeted energy-level alignment is revealed using transient absorption spectroscopy

DOI: 10.1039/c9mh00366e

Related People

Volker Blum
Duke University

Wei You
University of North Carolina, Chapel Hill 

Adrienne Stiff-Roberts
Duke University 

David Mitzi
Duke University

Image of chart about RIR-MAPLE