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Title: Lead-free halide double perovskite-polymer composites for flexible X-ray imaging

Journal Article · · Journal of Materials Chemistry C
DOI: https://doi.org/10.1039/C8TC01564C · OSTI ID:1526389
 [1];  [1];  [2];  [1];  [1];  [1]; ORCiD logo [3];  [1]
  1. Florida State Univ., Tallahassee, FL (United States)
  2. Florida State Univ., Tallahassee, FL (United States); National High Magnetic Field Lab, Tallahassee, FL (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

X-ray detectors are demonstrated using composite films of lead-free Cs2AgBiBr6 halide double perovskite embedded in a polymer matrix as the X-ray photoconductors. Polymers with hydroxyl functional groups greatly improve the uniformity of the composite films, and large area dense films are obtained using a simple drop-casting process. X-ray detectors based on the composite films exhibit a sensitivity of 40 μC Gyair-1 cm-2, comparable to the reported sensitivity using Cs2AgBiBr6 single crystals. Such detectors can also tolerate a 5% tensile/compressive strain in the composite films without performance degradation. Pixelated X-ray detectors fabricated on the same composite film can realize X-ray imaging and resolve a proof-of-concept geometric pattern.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1526389
Journal Information:
Journal of Materials Chemistry C, Journal Name: Journal of Materials Chemistry C Journal Issue: 44 Vol. 6; ISSN JMCCCX; ISSN 2050-7526
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)

Lead‐Free Cs 2 BiAgBr 6 Double Perovskite‐Based Humidity Sensor with Superfast Recovery Time journal April 2019
From Pb to Bi: A Promising Family of Pb‐Free Optoelectronic Materials and Devices journal April 2020
Lead‐Free Double Perovskites for Perovskite Solar Cells journal August 2019