scholarly journals Modulating Surface Morphology Related to Crystallization Speed of Perovskite Grain and Semiconductor Properties of Optical Absorber Layer under Controlled Doping of Potassium Ions for Solar Cells

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1605 ◽  
Author(s):  
Tao Ling ◽  
Xiaoping Zou ◽  
Jin Cheng ◽  
Ying Yang ◽  
Haiyan Ren ◽  
...  
Keyword(s):  
Solar Cells ◽  
Surface Morphology ◽  
Perovskite Solar Cells ◽  
Lead Iodide ◽  
Solvent Vapor ◽  
Crystallization Properties ◽  
Component Design ◽  
Crystallization Speed ◽  
Controlled Doping ◽  
Semiconductor Properties

Perovskite thin films with excellent optical semiconductor and crystallization properties and superior surface morphology are normally considered to be vital to perovskite solar cells (PSCs). In this paper, we systematically survey the process of modulating surface morphology and optical semiconductor and crystallization properties of methylammonium lead iodide film by controlling doping of K+ for PSC prepared in air and propose the mechanism of large K+-doped perovskite grain formation related to crystallization speed. The increase in the crystallization speed leads to the production of large grains without localized-solvent-vapor (LSV) pores via moderate doping of K+, and the exorbitant crystallization speed induces super large grains with LSV pores via excessive doping of K+. Furthermore, the semiconductor properties (absorption band edge wavelength, PL emission peak wavelength, energy band gap) of perovskite film can be significantly tuned by controlled doping of K+. The investigation of the detailed process of modulating surface morphology and semiconductor properties of perovskite thin film by controlled doping of K+ may provide guidance and pave the way for superior component design of absorption materials for cost-efficient PSCs.

An ionic compensation strategy for high-performance mesoporous perovskite solar cells: healing defects with tri-iodide ions in a solvent vapor annealing process

2019 ◽  
Vol 7 (1) ◽  
pp. 353-362 ◽  
Author(s):  
Tie Liu ◽  
Pengyu Su ◽  
Li Liu ◽  
Jun Wang ◽  
Shuang Feng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Surface Morphology ◽  
High Performance ◽  
Perovskite Solar Cells ◽  
Annealing Process ◽  
Compensation Strategy ◽  
Solvent Vapor ◽  
Iodide Ions ◽  
Vapor Annealing ◽  
Solvent Vapor Annealing

The surface morphology and J–V curves of CH3NH3PbI3 films with and without IPA/[I3−] treatment.

Organic solvent vapor treatment of lead iodide layers in the two-step sequential deposition of CH3NH3PbI3-based perovskite solar cells

2016 ◽  
Vol 4 (5) ◽  
pp. 1947-1952 ◽  
Author(s):  
M. I. El-Henawey ◽  
Ryan S. Gebhardt ◽  
M. M. El-Tonsy ◽  
Sumit Chaudhary
Keyword(s):  
Grain Size ◽  
Solar Cells ◽  
Organic Solvent ◽  
Perovskite Solar Cells ◽  
Lead Iodide ◽  
Solvent Vapor ◽  
Sequential Deposition ◽  
Vapor Treatment

The two step sequential deposition of CH3NH3PbI3-based perovskite solar cells has been modified by applying toluene and chlorobenzene vapors during the preparation of PbI2 films leading to the growth of the PbI2 grain size.

Characterization of Methylammonium Lead Iodide Perovskite Solar Cells by Surface Morphology Changes

2017 ◽  
Vol 17 (7) ◽  
pp. 4817-4821 ◽  
Author(s):  
Taewon Chung ◽  
Seongtak Kim ◽  
Soohyun Bae ◽  
Sang-Won Lee ◽  
Kyungjin Cho ◽  
...  
Keyword(s):  
Solar Cells ◽  
Surface Morphology ◽  
Perovskite Solar Cells ◽  
Lead Iodide ◽  
Methylammonium Lead Iodide ◽  
Morphology Changes

Ferroelectric domains in methylammonium lead iodide perovskite solar cells

2018 ◽  
Author(s):  
Holger Röhm ◽  
Tobias Leonhard ◽  
Michael J. Hoffmann ◽  
Alexander Colsmann
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Lead Iodide ◽  
Ferroelectric Domains ◽  
Methylammonium Lead Iodide

Fundamental Efficiency Limit of Lead Iodide Perovskite Solar Cells

2018 ◽  
Author(s):  
Luis Pazos-Outon ◽  
T. Patrick Xiao ◽  
Eli Yablonovitch
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Lead Iodide

scholarly journals Effects of 5-Ammonium Valeric Acid Iodide as Additive on Methyl Ammonium Lead Iodide Perovskite Solar Cells

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2512
Author(s):  
Daming Zheng ◽  
Changheng Tong ◽  
Tao Zhu ◽  
Yaoguang Rong ◽  
Thierry Pauporté
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Single Crystal Silicon ◽  
Mesoporous Structure ◽  
Valeric Acid ◽  
Electrical Impedance Spectroscopy ◽  
Lead Iodide ◽  
Crystal Silicon ◽  
Time Resolved ◽  
Hole Transporting

During the past decade, the power conversion efficiency (PCE) of perovskite solar cells (PSCs) has risen rapidly, and it now approaches the record for single crystal silicon solar cells. However, these devices still suffer from a problem of stability. To improve PSC stability, two approaches have been notably developed: the use of additives and/or post-treatments that can strengthen perovskite structures and the use of a nontypical architecture where three mesoporous layers, including a porous carbon backcontact without hole transporting layer, are employed. This paper focuses on 5-ammonium valeric acid iodide (5-AVAI or AVA) as an additive in methylammonium lead iodide (MAPI). By combining scanning electron microscopy (SEM), X-ray diffraction (XRD), time-resolved photoluminescence (TRPL), current–voltage measurements, ideality factor determination, and in-depth electrical impedance spectroscopy (EIS) investigations on various layers stacks structures, we discriminated the effects of a mesoscopic scaffold and an AVA additive. The AVA additive was found to decrease the bulk defects in perovskite (PVK) and boost the PVK resistance to moisture. The triple mesoporous structure was detrimental for the defects, but it improved the stability against humidity. On standard architecture, the PCE is 16.9% with the AVA additive instead of 18.1% for the control. A high stability of TiO2/ZrO2/carbon/perovskite cells was found due to both AVA and the protection by the all-inorganic scaffold. These cells achieved a PCE of 14.4% in the present work.

scholarly journals Fundamental Efficiency Limit of Lead Iodide Perovskite Solar Cells

2018 ◽  
Vol 9 (7) ◽  
pp. 1703-1711 ◽  
Author(s):  
Luis M. Pazos-Outón ◽  
T. Patrick Xiao ◽  
Eli Yablonovitch
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Lead Iodide

Synergistic improvements in the performance and stability of inverted planar MAPbI3-based perovskite solar cells incorporating benzylammonium halide salt additives

2021 ◽  
Author(s):  
Hung-Cheng Chen ◽  
Jie-Min Lan ◽  
Hsiang-Lin Hsu ◽  
Chia-Wei Li ◽  
Tien-Shou Shieh ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Optical Properties ◽  
Solar Cells ◽  
Solar Cell ◽  
Surface Morphology ◽  
Perovskite Solar Cells ◽  
Cell Performance ◽  
Solar Cell Performance ◽  
Halide Salt

Three different benzylammonium halide (Cl, Br, and I) salts were investigated to elucidate their effects as additives on MAPbI3 perovskite surface morphology, crystal structure, optical properties, and solar cell performance and stability.

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