Polycrystalline Formamidinium Lead Bromide X-ray Detectors
We have investigated the performance of formamidinium lead bromide (FAPbBr<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>3</mn></msub></semantics></...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-02-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/12/4/2013 |
| _version_ | 1827657340355084288 |
|---|---|
| author | Suad Alghamdi Stephanie Bennett Carol Crean Joydip Ghosh Harry Gibbard Robert Moss Justin Reiss Douglas Wolfe Paul Sellin |
| author_facet | Suad Alghamdi Stephanie Bennett Carol Crean Joydip Ghosh Harry Gibbard Robert Moss Justin Reiss Douglas Wolfe Paul Sellin |
| author_sort | Suad Alghamdi |
| collection | DOAJ |
| description | We have investigated the performance of formamidinium lead bromide (FAPbBr<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>3</mn></msub></semantics></math></inline-formula>) perovskite X-ray detectors fabricated from polycrystalline material that is pressed into a pellet at high pressures. FAPbBr<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>3</mn></msub></semantics></math></inline-formula> has been shown to exhibit a remarkable combination of electrical and physical properties, such that mechanically-formed polycrystalline pellets exhibit good charge transport properties suitable for use as X-ray detectors. We characterise the morphology and structure of FAPbBr<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>3</mn></msub></semantics></math></inline-formula> pellets using photoluminescence (PL), electron microscopy (SEM) and X-ray diffraction (XRD), and demonstrate an improvement in the microstructure, density, and charge transport performance of the material as the pressure is increased from 12 MPa to 124 MPa. The use of annealing of the pellets after pressing also improves the stability and charge transport performance of the devices. Using a 40 kV X-ray beam, a maximum X-ray sensitivity of 169 µC Gy<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></semantics></math></inline-formula> cm<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mrow><mo>−</mo><mn>2</mn></mrow></msup></semantics></math></inline-formula> was measured, and the fast time response of the devices was demonstrated using a chopped X-ray beam. |
| first_indexed | 2024-03-09T22:41:51Z |
| format | Article |
| id | doaj.art-aa3d3733ba1a4a8989adcc749ad27e7f |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T22:41:51Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-aa3d3733ba1a4a8989adcc749ad27e7f2023-11-23T18:37:50ZengMDPI AGApplied Sciences2076-34172022-02-01124201310.3390/app12042013Polycrystalline Formamidinium Lead Bromide X-ray DetectorsSuad Alghamdi0Stephanie Bennett1Carol Crean2Joydip Ghosh3Harry Gibbard4Robert Moss5Justin Reiss6Douglas Wolfe7Paul Sellin8Department of Physics, University of Surrey, Guildford GU2 7XH, UKDepartment of Physics, University of Surrey, Guildford GU2 7XH, UKDepartment of Chemistry, University of Surrey, Guildford GU2 7XH, UKDepartment of Physics, University of Surrey, Guildford GU2 7XH, UKDepartment of Physics, University of Surrey, Guildford GU2 7XH, UKDepartment of Medical Physics and Biomedical Engineering, University College London, London WC1E 6BT, UKApplied Research Laboratory, Materials Science and Engineering Department, The Pennsylvania State University, University Park, PA 16802, USAApplied Research Laboratory, Materials Science and Engineering Department, The Pennsylvania State University, University Park, PA 16802, USADepartment of Physics, University of Surrey, Guildford GU2 7XH, UKWe have investigated the performance of formamidinium lead bromide (FAPbBr<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>3</mn></msub></semantics></math></inline-formula>) perovskite X-ray detectors fabricated from polycrystalline material that is pressed into a pellet at high pressures. FAPbBr<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>3</mn></msub></semantics></math></inline-formula> has been shown to exhibit a remarkable combination of electrical and physical properties, such that mechanically-formed polycrystalline pellets exhibit good charge transport properties suitable for use as X-ray detectors. We characterise the morphology and structure of FAPbBr<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>3</mn></msub></semantics></math></inline-formula> pellets using photoluminescence (PL), electron microscopy (SEM) and X-ray diffraction (XRD), and demonstrate an improvement in the microstructure, density, and charge transport performance of the material as the pressure is increased from 12 MPa to 124 MPa. The use of annealing of the pellets after pressing also improves the stability and charge transport performance of the devices. Using a 40 kV X-ray beam, a maximum X-ray sensitivity of 169 µC Gy<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></semantics></math></inline-formula> cm<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mrow><mo>−</mo><mn>2</mn></mrow></msup></semantics></math></inline-formula> was measured, and the fast time response of the devices was demonstrated using a chopped X-ray beam.https://www.mdpi.com/2076-3417/12/4/2013formamidinium lead bromideperovskiteX-ray detector |
| spellingShingle | Suad Alghamdi Stephanie Bennett Carol Crean Joydip Ghosh Harry Gibbard Robert Moss Justin Reiss Douglas Wolfe Paul Sellin Polycrystalline Formamidinium Lead Bromide X-ray Detectors Applied Sciences formamidinium lead bromide perovskite X-ray detector |
| title | Polycrystalline Formamidinium Lead Bromide X-ray Detectors |
| title_full | Polycrystalline Formamidinium Lead Bromide X-ray Detectors |
| title_fullStr | Polycrystalline Formamidinium Lead Bromide X-ray Detectors |
| title_full_unstemmed | Polycrystalline Formamidinium Lead Bromide X-ray Detectors |
| title_short | Polycrystalline Formamidinium Lead Bromide X-ray Detectors |
| title_sort | polycrystalline formamidinium lead bromide x ray detectors |
| topic | formamidinium lead bromide perovskite X-ray detector |
| url | https://www.mdpi.com/2076-3417/12/4/2013 |
| work_keys_str_mv | AT suadalghamdi polycrystallineformamidiniumleadbromidexraydetectors AT stephaniebennett polycrystallineformamidiniumleadbromidexraydetectors AT carolcrean polycrystallineformamidiniumleadbromidexraydetectors AT joydipghosh polycrystallineformamidiniumleadbromidexraydetectors AT harrygibbard polycrystallineformamidiniumleadbromidexraydetectors AT robertmoss polycrystallineformamidiniumleadbromidexraydetectors AT justinreiss polycrystallineformamidiniumleadbromidexraydetectors AT douglaswolfe polycrystallineformamidiniumleadbromidexraydetectors AT paulsellin polycrystallineformamidiniumleadbromidexraydetectors |