Improved Radiation Sensing with Methylammonium Lead Tribromide Perovskite Semiconductors

Ryan Tan; Bogdan Dryzhakov; Jessica Charest; Bin Hu; Mahshid Ahmadi; Eric Lukosi

doi:10.1016/j.nima.2020.164710

Improved Radiation Sensing with Methylammonium Lead Tribromide Perovskite Semiconductors

Ryan Tan
, Bogdan Dryzhakov
, Jessica Charest
, Bin Hu
, Mahshid Ahmadi
, Eric Lukosi

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

Recently, organometallic halide perovskites (OMHPs) have attracted much interest as a potential medium resolution detector for ionizing radiation sensing applications. Despite moderate success in the development of OMHP radiation detectors to date, efforts to optimize bulk carrier properties are often hindered by device degradation caused by surface recombination, ionic conductivity, environmental instability, and interface phenomena. In this study, methods of improving the interfacial and surface properties, detector stability, and responsivity of methylammonium lead tribromide (MAPB) semiconductor radiation detectors were investigated. We demonstrated that chemomechanical polishing with dimethylformamide (DMF) as a finishing step decreased surface roughness, removed surface trap states, and greatly enhanced device stability compared to mechanical polishing. Further, using a tin oxide (SnO₂) interface layer as hole blocking/electron transporting layer greatly increased the device fabrication success rate and helped mitigate the effect of ion migration reactions with metallic contacts. These post-growth processing techniques resulted in the first electron response of a MAPB detector exposed to alpha particles.

Original language	English
Article number	164710
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	986
DOIs	https://doi.org/10.1016/j.nima.2020.164710
State	Published - Jan 11 2021
Externally published	Yes

Funding

This material is based upon work supported by the U.S. Department of Homeland Security under grant no. 16DNARI00018-04-0. Part of this work was conducted in the Micro-Processing Research Facility, a University of Tennessee Core Facility. Disclaimer: The views and conclusions contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. Department of Homeland Security. This material is based upon work supported by the U.S. Department of Homeland Security under grant no. 16DNARI00018-04-0 . Part of this work was conducted in the Micro-Processing Research Facility, a University of Tennessee Core Facility. Disclaimer: The views and conclusions contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. Department of Homeland Security.

Keywords

Chemomechanical polishing
Methylammonium lead bromide
Perovskite
Radiation detection
Tin oxide

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10.1016/j.nima.2020.164710

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title = "Improved Radiation Sensing with Methylammonium Lead Tribromide Perovskite Semiconductors",

abstract = "Recently, organometallic halide perovskites (OMHPs) have attracted much interest as a potential medium resolution detector for ionizing radiation sensing applications. Despite moderate success in the development of OMHP radiation detectors to date, efforts to optimize bulk carrier properties are often hindered by device degradation caused by surface recombination, ionic conductivity, environmental instability, and interface phenomena. In this study, methods of improving the interfacial and surface properties, detector stability, and responsivity of methylammonium lead tribromide (MAPB) semiconductor radiation detectors were investigated. We demonstrated that chemomechanical polishing with dimethylformamide (DMF) as a finishing step decreased surface roughness, removed surface trap states, and greatly enhanced device stability compared to mechanical polishing. Further, using a tin oxide (SnO2) interface layer as hole blocking/electron transporting layer greatly increased the device fabrication success rate and helped mitigate the effect of ion migration reactions with metallic contacts. These post-growth processing techniques resulted in the first electron response of a MAPB detector exposed to alpha particles.",

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Improved Radiation Sensing with Methylammonium Lead Tribromide Perovskite Semiconductors. / Tan, Ryan; Dryzhakov, Bogdan; Charest, Jessica et al.
In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 986, 164710, 11.01.2021.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Improved Radiation Sensing with Methylammonium Lead Tribromide Perovskite Semiconductors

AU - Tan, Ryan

AU - Dryzhakov, Bogdan

AU - Charest, Jessica

AU - Hu, Bin

AU - Ahmadi, Mahshid

AU - Lukosi, Eric

PY - 2021/1/11

Y1 - 2021/1/11

N2 - Recently, organometallic halide perovskites (OMHPs) have attracted much interest as a potential medium resolution detector for ionizing radiation sensing applications. Despite moderate success in the development of OMHP radiation detectors to date, efforts to optimize bulk carrier properties are often hindered by device degradation caused by surface recombination, ionic conductivity, environmental instability, and interface phenomena. In this study, methods of improving the interfacial and surface properties, detector stability, and responsivity of methylammonium lead tribromide (MAPB) semiconductor radiation detectors were investigated. We demonstrated that chemomechanical polishing with dimethylformamide (DMF) as a finishing step decreased surface roughness, removed surface trap states, and greatly enhanced device stability compared to mechanical polishing. Further, using a tin oxide (SnO2) interface layer as hole blocking/electron transporting layer greatly increased the device fabrication success rate and helped mitigate the effect of ion migration reactions with metallic contacts. These post-growth processing techniques resulted in the first electron response of a MAPB detector exposed to alpha particles.

AB - Recently, organometallic halide perovskites (OMHPs) have attracted much interest as a potential medium resolution detector for ionizing radiation sensing applications. Despite moderate success in the development of OMHP radiation detectors to date, efforts to optimize bulk carrier properties are often hindered by device degradation caused by surface recombination, ionic conductivity, environmental instability, and interface phenomena. In this study, methods of improving the interfacial and surface properties, detector stability, and responsivity of methylammonium lead tribromide (MAPB) semiconductor radiation detectors were investigated. We demonstrated that chemomechanical polishing with dimethylformamide (DMF) as a finishing step decreased surface roughness, removed surface trap states, and greatly enhanced device stability compared to mechanical polishing. Further, using a tin oxide (SnO2) interface layer as hole blocking/electron transporting layer greatly increased the device fabrication success rate and helped mitigate the effect of ion migration reactions with metallic contacts. These post-growth processing techniques resulted in the first electron response of a MAPB detector exposed to alpha particles.

KW - Chemomechanical polishing

KW - Methylammonium lead bromide

KW - Perovskite

KW - Radiation detection

KW - Tin oxide

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ER -

Improved Radiation Sensing with Methylammonium Lead Tribromide Perovskite Semiconductors

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