東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Nanoscale Spatial Realization of Gra...

Chowdhury, Ashraful Haider.

FindBook

Google Book

Amazon

博客來

Nanoscale Spatial Realization of Grain Boundary Defects and Its Passivation in Perovskite Solar Cells.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Nanoscale Spatial Realization of Grain Boundary Defects and Its Passivation in Perovskite Solar Cells./
作者:	Chowdhury, Ashraful Haider.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
面頁冊數:	112 p.
附註:	Source: Dissertations Abstracts International, Volume: 82-12, Section: B.
Contained By:	Dissertations Abstracts International82-12B.
標題:	Electrical engineering. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28415357
ISBN:	9798515203795

Nanoscale Spatial Realization of Grain Boundary Defects and Its Passivation in Perovskite Solar Cells.
Chowdhury, Ashraful Haider.

Nanoscale Spatial Realization of Grain Boundary Defects and Its Passivation in Perovskite Solar Cells. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 112 p.

Source: Dissertations Abstracts International, Volume: 82-12, Section: B.

Thesis (Ph.D.)--South Dakota State University, 2021.

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

Perovskite solar cells (PSCs) have seen significant improvement in photovoltaic performance in recent days. However, the performance of PSCs is limited by the defects present at grain boundaries (GB). The study adapted here discusses the nanoscale spatial realization of grain boundary defects and its passivation in perovskite solar cells. Conventional MAPbI3 and state- of-the-art Cs5(MA0.17FA0.83)95Pb(I0.83Br0.17)3-FAMACs perovskite GBs were studied in detail using atomic force microscopy. The density of trap states calculation by kelvin probe force microscopy (KPFM) shows that FAMACs perovskites have lower defects at GB compared with MAPbI3 perovskites. This improvement is caused by the less activation energy of the point defects in FAMACs due to mixing of cations and anions in perovskite structure compared with MAPbI3 perovskites. FAMACs perovskite GBs are less dominated by the defect ion migration evident from the negligible local dark-current hysteresis at GBs. To further passivate defects at the GB, FAMACs perovskite was post-treated by using an organic halide salt named phenylhydrazinium iodide (PHI). Defects analysis and passivation at GB of FAMACs perovskite were evaluated using atomic force microscopy technique through mapping of carrier recombination lifetime (τr), transport time (τt) and diffusion length (LD). These spatially resolved charge carrier dynamics parameters reveal substantial variations at GB of control and passivated perovskites. Defects analysis and passivation at GB of FAMACs perovskite through charge carrier dynamics nanoscale mapping, KPFM and CAFM demonstrate that optimized concentration of PHI can passivates the positively charged defects and significantly improves charge carrier dynamics at GB compared to control sample. This improvement in nanoscale charge transport in passivated FAMACs gives a PCE of ~20% whereas MAPbI3 and non-passivated FAMACs perovskites show ~17% and ~ 18% PCE, respectively. This clearly indicates that GB passivation in FAMACs reduces the positively charged defects and gives champion PCE of ~20%.

ISBN: 9798515203795Subjects--Topical Terms:

649834
Electrical engineering.
Subjects--Index Terms:

Atomic force microscopy

Nanoscale Spatial Realization of Grain Boundary Defects and Its Passivation in Perovskite Solar Cells.
LDR:03368nmm a2200397 4500 001 2281612
005 20210920103557.5
008 220723s2021 ||||||||||||||||| ||eng d
020 $a 9798515203795
035 $a (MiAaPQ)AAI28415357
035 $a AAI28415357
040 $a MiAaPQ $c MiAaPQ
100 1 $a Chowdhury, Ashraful Haider. $3 3560287
245 1 0 $a Nanoscale Spatial Realization of Grain Boundary Defects and Its Passivation in Perovskite Solar Cells.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2021
300 $a 112 p.
500 $a Source: Dissertations Abstracts International, Volume: 82-12, Section: B.
500 $a Advisor: Qiao, Qiquan.
502 $a Thesis (Ph.D.)--South Dakota State University, 2021.
506 $a This item must not be sold to any third party vendors.
520 $a Perovskite solar cells (PSCs) have seen significant improvement in photovoltaic performance in recent days. However, the performance of PSCs is limited by the defects present at grain boundaries (GB). The study adapted here discusses the nanoscale spatial realization of grain boundary defects and its passivation in perovskite solar cells. Conventional MAPbI3 and state- of-the-art Cs5(MA0.17FA0.83)95Pb(I0.83Br0.17)3-FAMACs perovskite GBs were studied in detail using atomic force microscopy. The density of trap states calculation by kelvin probe force microscopy (KPFM) shows that FAMACs perovskites have lower defects at GB compared with MAPbI3 perovskites. This improvement is caused by the less activation energy of the point defects in FAMACs due to mixing of cations and anions in perovskite structure compared with MAPbI3 perovskites. FAMACs perovskite GBs are less dominated by the defect ion migration evident from the negligible local dark-current hysteresis at GBs. To further passivate defects at the GB, FAMACs perovskite was post-treated by using an organic halide salt named phenylhydrazinium iodide (PHI). Defects analysis and passivation at GB of FAMACs perovskite were evaluated using atomic force microscopy technique through mapping of carrier recombination lifetime (τr), transport time (τt) and diffusion length (LD). These spatially resolved charge carrier dynamics parameters reveal substantial variations at GB of control and passivated perovskites. Defects analysis and passivation at GB of FAMACs perovskite through charge carrier dynamics nanoscale mapping, KPFM and CAFM demonstrate that optimized concentration of PHI can passivates the positively charged defects and significantly improves charge carrier dynamics at GB compared to control sample. This improvement in nanoscale charge transport in passivated FAMACs gives a PCE of ~20% whereas MAPbI3 and non-passivated FAMACs perovskites show ~17% and ~ 18% PCE, respectively. This clearly indicates that GB passivation in FAMACs reduces the positively charged defects and gives champion PCE of ~20%.
590 $a School code: 0205.
650 4 $a Electrical engineering. $3 649834
650 4 $a Materials science. $3 543314
650 4 $a Nanotechnology. $3 526235
650 4 $a Alternative energy. $3 3436775
653 $a Atomic force microscopy
653 $a Charge carrier dynamics
653 $a Nanoscale mapping
653 $a Phenylhydrazinium iodide
653 $a Charge transport
653 $a Positively charged defects
690 $a 0544
690 $a 0363
690 $a 0794
690 $a 0652
710 2 $a South Dakota State University. $b Electrical Engineering & Computer Science. $3 3353205
773 0 $t Dissertations Abstracts International $g 82-12B.
790 $a 0205
791 $a Ph.D.
792 $a 2021
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28415357