Highly stable CsPbBr3/ PMA perovskite nanocrystals for improved optical performance
In this study, to address the stability issues, we synthesized a CsPbBr3-coated poly (maleic anhydride-alt-1-octadecene) (CsPbBr3/PMA) using a modified hot-injection method. The CsPbBr3/PMA perovskite nanocrystals (PNCs) exhibited effective green emission at 522 nm with an improved photoluminescence...
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| Language: | English |
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Elsevier
2024-01-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844024005280 |
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| author | Purusottam Reddy Bommireddy Jagadeesh Babu B Sreedhar Sunku Kamal Basha C Youngsuk Suh Chandra Sekhar M Si-Hyun Park |
| author_facet | Purusottam Reddy Bommireddy Jagadeesh Babu B Sreedhar Sunku Kamal Basha C Youngsuk Suh Chandra Sekhar M Si-Hyun Park |
| author_sort | Purusottam Reddy Bommireddy |
| collection | DOAJ |
| description | In this study, to address the stability issues, we synthesized a CsPbBr3-coated poly (maleic anhydride-alt-1-octadecene) (CsPbBr3/PMA) using a modified hot-injection method. The CsPbBr3/PMA perovskite nanocrystals (PNCs) exhibited effective green emission at 522 nm with an improved photoluminescence quantum yield (86.8 %) compared to traditional CsPbBr3 PNCs (54.2 %). The ligands in the polymer coating can bond with the uncoordinated Pb and Br ions on the surface of PNCs to minimize surface defects and avoid exposure to the external environment, enhancing the stability of the perovskites. Time-resolved photoluminescence spectra showed longer lifetimes for CsPbBr3/PMA PNCs, while transient absorption measurements provided valuable insights into the intraband hot-exciton relaxation and recombination. We demonstrate the potential application of CSPbBr3/PMA in a down-conversion white-light-emitting diode (LED) by coupling green CsPbBr3/PMA and red K2SiF6:Mn4+ phosphor-coated glass slides onto a 455-nm blue GaN LED. The white LED produced a white light with the International Commission on Illumination color coordinates of (0.323, 0.345), luminous efficiency of 58.4 lm/W, and color rendering index of 83.2. The fabricated, white-LED system obtained a wide color gamut of 125.3 % of the National Television Standards Committee and 98.9 % of Rec. 2020. The findings demonstrate that CsPbBr3/PMA can be an efficient down-conversion material for white LEDs and backlighting. |
| first_indexed | 2024-03-08T06:55:14Z |
| format | Article |
| id | doaj.art-adb14eb83bab4676aa55e53efcf22a73 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-03-08T06:55:14Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-adb14eb83bab4676aa55e53efcf22a732024-02-03T06:37:41ZengElsevierHeliyon2405-84402024-01-01102e24497Highly stable CsPbBr3/ PMA perovskite nanocrystals for improved optical performancePurusottam Reddy Bommireddy0Jagadeesh Babu B1Sreedhar Sunku2Kamal Basha C3Youngsuk Suh4Chandra Sekhar M5Si-Hyun Park6Department of Electronic Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan-si, Gyeongsanbuk-do, South KoreaDepartment of Physics, Madanapalle Institute of Technology and Science, Madanapalle, 517325, IndiaDepartment of Physics, Madanapalle Institute of Technology and Science, Madanapalle, 517325, IndiaDepartment of Electrical and Electronics Engineering, Madanapalle Institute of Technology and Science, Madanapalle, 517325, IndiaDepartment of Electronic Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan-si, Gyeongsanbuk-do, South KoreaDepartment of Physics, Madanapalle Institute of Technology and Science, Madanapalle, 517325, India; Corresponding author.Department of Electronic Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan-si, Gyeongsanbuk-do, South Korea; Corresponding author.In this study, to address the stability issues, we synthesized a CsPbBr3-coated poly (maleic anhydride-alt-1-octadecene) (CsPbBr3/PMA) using a modified hot-injection method. The CsPbBr3/PMA perovskite nanocrystals (PNCs) exhibited effective green emission at 522 nm with an improved photoluminescence quantum yield (86.8 %) compared to traditional CsPbBr3 PNCs (54.2 %). The ligands in the polymer coating can bond with the uncoordinated Pb and Br ions on the surface of PNCs to minimize surface defects and avoid exposure to the external environment, enhancing the stability of the perovskites. Time-resolved photoluminescence spectra showed longer lifetimes for CsPbBr3/PMA PNCs, while transient absorption measurements provided valuable insights into the intraband hot-exciton relaxation and recombination. We demonstrate the potential application of CSPbBr3/PMA in a down-conversion white-light-emitting diode (LED) by coupling green CsPbBr3/PMA and red K2SiF6:Mn4+ phosphor-coated glass slides onto a 455-nm blue GaN LED. The white LED produced a white light with the International Commission on Illumination color coordinates of (0.323, 0.345), luminous efficiency of 58.4 lm/W, and color rendering index of 83.2. The fabricated, white-LED system obtained a wide color gamut of 125.3 % of the National Television Standards Committee and 98.9 % of Rec. 2020. The findings demonstrate that CsPbBr3/PMA can be an efficient down-conversion material for white LEDs and backlighting.http://www.sciencedirect.com/science/article/pii/S2405844024005280NanocompositesOptical materials/propertiesPerovskite nanocrystals |
| spellingShingle | Purusottam Reddy Bommireddy Jagadeesh Babu B Sreedhar Sunku Kamal Basha C Youngsuk Suh Chandra Sekhar M Si-Hyun Park Highly stable CsPbBr3/ PMA perovskite nanocrystals for improved optical performance Heliyon Nanocomposites Optical materials/properties Perovskite nanocrystals |
| title | Highly stable CsPbBr3/ PMA perovskite nanocrystals for improved optical performance |
| title_full | Highly stable CsPbBr3/ PMA perovskite nanocrystals for improved optical performance |
| title_fullStr | Highly stable CsPbBr3/ PMA perovskite nanocrystals for improved optical performance |
| title_full_unstemmed | Highly stable CsPbBr3/ PMA perovskite nanocrystals for improved optical performance |
| title_short | Highly stable CsPbBr3/ PMA perovskite nanocrystals for improved optical performance |
| title_sort | highly stable cspbbr3 pma perovskite nanocrystals for improved optical performance |
| topic | Nanocomposites Optical materials/properties Perovskite nanocrystals |
| url | http://www.sciencedirect.com/science/article/pii/S2405844024005280 |
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