國立高雄大學圖資館 |

登入

回首頁 到查詢結果 [ subject:"Pandemics." ]

Quasi-Two-Dimensional Halide Perovskite Materials for Photovoltaic Applications.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Quasi-Two-Dimensional Halide Perovskite Materials for Photovoltaic Applications.
作者:	Coffey, Aidan H.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, 2023
面頁冊數:	102 p.
附註:	Source: Dissertations Abstracts International, Volume: 85-01, Section: B.
附註:	Advisor: Dou, Letian.
Contained By:	Dissertations Abstracts International85-01B.
標題:	Humidity.
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30540007
ISBN:	9798379881658

Quasi-Two-Dimensional Halide Perovskite Materials for Photovoltaic Applications.
Coffey, Aidan H.

Quasi-Two-Dimensional Halide Perovskite Materials for Photovoltaic Applications. - Ann Arbor : ProQuest Dissertations & Theses, 2023 - 102 p.

Source: Dissertations Abstracts International, Volume: 85-01, Section: B.

Thesis (Ph.D.)--Purdue University, 2023.

This item must not be sold to any third party vendors.

As energy demands for the world increase, the necessity for alternate sources of energy are critical. Just in the United States alone, 92 quadrillion British thermal units (Btu) were used in 2020. As political and geographical pressures surrounding oil increase, along with the growing concern for climate, the drive to explore alternative and renewable means for harvesting energy is on the rise. Solar cells, also known as photovoltaics (PVs), are an attractive renewable source and have been developed as an alternative energy means for over 60 years. When considering losses due to atmospheric absorption and scattering, the Earth’s surface gets about 1000 W/m2 of energy from the sun, which is why there are research efforts around the world trying to maximize the efficiency of solar cells.Organic-inorganic halide perovskites provide for ideal absorbing layers that feature long carrier lifetime and diffusion lengths, strong photoluminescence, and promising tunability. Furthermore, the solution-processing methods used to make these perovskites ensure that the solar cells will remain low-cost and have easy scale-up possibilities. The main problem perovskites is that they degrade in the presence of water, thus leading to decreased device performance.In this work two approaches are investigated to increase moisture stability. The first investigates incorporation of thiols as pseudohalides into the 2D perovskite structure. Instead of the theorized perovskite, two novel 2D compounds were created, Pb2X(S-C6H5)3 (X= I, Br, Cl) and PbI1.524(S-C6H5)0.476. While not perovskites, this study gives insight into the effect that the thiol may have on determining structure when comparing –S-C6H5with –SCN groups. Future work will explore more electronegative thiols that will be used to make moisture resistant, tunable 2D perovskitesThe second approach is to incorporate longer organic ammonium cations into the perovskite structure to produce quasi-2D perovskite films fabricate them into devices. Adding in electronically insulating ligands leads to a stricter requirement for vertically aligned 2D films and special care must be taken to have efficient charge collection. The current field has successfully incorporated short ligands such as butylammonium (BA) into PVs, however the extension to larger and more beneficially hydrophobic ligands has been very scarce. In this work, a novel solvent engineering system is developed to create vertically aligned quasi-2D perovskite absorbing layers based off of a bithiophene ligand (2T). These absorbing layers are then characterized and incorporated into efficient PV devices. Generalizations to solvent conditions related to ligand choice is discussed herein, creating deep insights into incorporating more conjugated ligands into devices.

ISBN: 9798379881658Subjects--Topical Terms:

966895
Humidity.

Quasi-Two-Dimensional Halide Perovskite Materials for Photovoltaic Applications.
LDR:04021nmm a2200421 4500 001 655802
005 20240414211934.5
006 m o d
007 cr#unu||||||||
008 240620s2023 ||||||||||||||||| ||eng d
020 $a 9798379881658
035 $a (MiAaPQ)AAI30540007
035 $a (MiAaPQ)Purdue19686375
035 $a AAI30540007
040 $a MiAaPQ $c MiAaPQ
100 1 $a Coffey, Aidan H. $3 966894
245 1 0 $a Quasi-Two-Dimensional Halide Perovskite Materials for Photovoltaic Applications.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2023
300 $a 102 p.
500 $a Source: Dissertations Abstracts International, Volume: 85-01, Section: B.
500 $a Advisor: Dou, Letian.
502 $a Thesis (Ph.D.)--Purdue University, 2023.
506 $a This item must not be sold to any third party vendors.
520 $a As energy demands for the world increase, the necessity for alternate sources of energy are critical. Just in the United States alone, 92 quadrillion British thermal units (Btu) were used in 2020. As political and geographical pressures surrounding oil increase, along with the growing concern for climate, the drive to explore alternative and renewable means for harvesting energy is on the rise. Solar cells, also known as photovoltaics (PVs), are an attractive renewable source and have been developed as an alternative energy means for over 60 years. When considering losses due to atmospheric absorption and scattering, the Earth’s surface gets about 1000 W/m2 of energy from the sun, which is why there are research efforts around the world trying to maximize the efficiency of solar cells.Organic-inorganic halide perovskites provide for ideal absorbing layers that feature long carrier lifetime and diffusion lengths, strong photoluminescence, and promising tunability. Furthermore, the solution-processing methods used to make these perovskites ensure that the solar cells will remain low-cost and have easy scale-up possibilities. The main problem perovskites is that they degrade in the presence of water, thus leading to decreased device performance.In this work two approaches are investigated to increase moisture stability. The first investigates incorporation of thiols as pseudohalides into the 2D perovskite structure. Instead of the theorized perovskite, two novel 2D compounds were created, Pb2X(S-C6H5)3 (X= I, Br, Cl) and PbI1.524(S-C6H5)0.476. While not perovskites, this study gives insight into the effect that the thiol may have on determining structure when comparing –S-C6H5with –SCN groups. Future work will explore more electronegative thiols that will be used to make moisture resistant, tunable 2D perovskitesThe second approach is to incorporate longer organic ammonium cations into the perovskite structure to produce quasi-2D perovskite films fabricate them into devices. Adding in electronically insulating ligands leads to a stricter requirement for vertically aligned 2D films and special care must be taken to have efficient charge collection. The current field has successfully incorporated short ligands such as butylammonium (BA) into PVs, however the extension to larger and more beneficially hydrophobic ligands has been very scarce. In this work, a novel solvent engineering system is developed to create vertically aligned quasi-2D perovskite absorbing layers based off of a bithiophene ligand (2T). These absorbing layers are then characterized and incorporated into efficient PV devices. Generalizations to solvent conditions related to ligand choice is discussed herein, creating deep insights into incorporating more conjugated ligands into devices.
590 $a School code: 0183.
650 4 $a Humidity. $3 966895
650 4 $a Emissions. $3 915579
650 4 $a Earth. $3 862512
650 4 $a Decomposition. $3 915580
650 4 $a Crystallization. $3 224120
650 4 $a Accretion disks. $3 966896
650 4 $a Thin films. $3 203678
650 4 $a Energy consumption. $3 214409
650 4 $a Climate change. $2 bicssc $3 689368
650 4 $a Sun. $3 308957
650 4 $a Asymmetry. $3 942552
650 4 $a Scanning electron microscopy. $3 242518
650 4 $a Crystal structure. $3 915771
650 4 $a Solar energy. $3 242824
650 4 $a Carbon. $3 199316
650 4 $a Solvents. $3 196670
650 4 $a Pandemics. $3 874958
650 4 $a Selenium. $3 522397
650 4 $a Photovoltaic cells. $3 215308
650 4 $a Silicon wafers. $3 966897
650 4 $a Alternative energy sources. $3 966898
650 4 $a Atoms & subatomic particles. $3 915685
650 4 $a Alternative energy. $3 857402
650 4 $a Astronomy. $3 204077
650 4 $a Atmospheric sciences. $3 886604
650 4 $a Atomic physics. $3 795463
650 4 $a Condensed matter physics. $3 708726
650 4 $a Energy. $3 212397
650 4 $a Materials science. $3 221779
650 4 $a Physics. $3 179414
690 $a 0404
690 $a 0363
690 $a 0606
690 $a 0725
690 $a 0748
690 $a 0611
690 $a 0791
690 $a 0794
690 $a 0605
710 2 $a Purdue University. $3 966863
773 0 $t Dissertations Abstracts International $g 85-01B.
790 $a 0183
791 $a Ph.D.
792 $a 2023
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30540007