Development of Ultra-Fast Semiconducting Scintillators Using Quantum Confinement Effect

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Published 24 September 2004 • Copyright (c) 2004 The Japan Society of Applied Physics
, , Citation Kengo Shibuya et al 2004 Jpn. J. Appl. Phys. 43 L1333 DOI 10.1143/JJAP.43.L1333

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Author affiliations

1 Quantum Engineering and Systems Science, The University of Tokyo, Tokyo 113-8656, Japan

2 Technology Transfer Facilitation Program, Japan Science and Technology Agency, Tokyo 102-8666, Japan

3 Nuclear Engineering Research Laboratory, The University of Tokyo, Ibaraki 319-1188, Japan

4 Department of Applied Chemistry, Tohoku University, Sendai 980-8579, Japan

Dates

  1. Received 13 July 2004
  2. Accepted 26 August 2004
  3. Published

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Abstract

The concept of a "quantum scintillator", satisfying both a large light output and a quick response, is proposed. The temporal behavior of scintillation from (n-C6H13NH3)2PbI4, a natural multiple quantum well structure provided by the lead-halide-based perovskite-type organic-inorganic hybrid compound, was investigated using a short-pulsed electron beam and a streak camera. A decay component of 390 ps was efficiently observed even at room temperature. This response is notably quicker than conventional Ce3+-activated scintillators because of a quantum confinement effect that increases the overlapping region of electron and hole wavefunctions in the low-dimensional system. This achievement would be the next breakthrough in the development of ultra-fast inorganic scintillators.

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