scholarly journals Impact of Perovskite Composition on Film Formation Quality and Photophysical Properties for Flexible Perovskite Solar Cells

Molecules ◽  
2020 ◽  
Vol 25 (3) ◽  
pp. 732 ◽  
Author(s):  
Guangdong Li ◽  
Xiaoping Zou ◽  
Jin Cheng ◽  
Dan Chen ◽  
Yujun Yao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Film Formation ◽  
Photophysical Properties ◽  
Perovskite Solar Cells ◽  
Precursor Solution ◽  
Solution Concentration ◽  
Precursor Solution Concentration ◽  
Composition Optimization ◽  
A Site ◽  
Low Temperature Process

In recent years, flexible perovskite solar cells have drawn tremendous attention in the field of wearable devices, and optimization of perovskite composition plays an important role in improving film quality and photophysical properties. At present, some researchers have only studied A-site organic cations mixing or X-site halide anions mixing in the ABX3 structure of perovskite, but there are few reports on co-mixing of A-site and X-site ions in flexible perovskite solar cells. In this paper, we mainly try to study the effects of different concentrations of mixed formamidine methylamine halide (FAxMA1-xBrxClyI1-x-y) precursor solutions on the quality and photophysical properties of perovskite films under low temperature process. We conclude that the film quality and photophysical properties reached the best results when the optimized precursor solution concentration was 60:6:6. The investigation on composition optimization in this experiment laid the foundation for the improvement of the performance of flexible perovskite solar cells. We also use the results of this experiment to prepare flexible perovskite solar cells based on carbon electrodes, which are expected to be applied in other flexible optoelectronic or electro-optical devices.

scholarly journals Cost-efficient, Effect of Low-Quality PbI2 Purification to Enhance Performances of Perovskite Quantum Dots and Perovskite Solar Cells

Energies ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 201
Author(s):  
ChaeHyun Lee ◽  
YeJi Shin ◽  
Gyeong G. Jeon ◽  
Dongwoo Kang ◽  
Jiwon Jung ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Photophysical Properties ◽  
Perovskite Solar Cells ◽  
Precursor Solution ◽  
Modern Society ◽  
High Quality ◽  
Material Development ◽  
Research Fields ◽  
Perovskite Quantum Dots

In modern society, high-quality material development and a large stable supply are key to perform frontier research and development. However, there are negative issues to address to utilize high-quality resources with a large stable supply for research, such as economic accessibility, commercialization, and so on. One of the cutting-edge research fields, perovskite-related research, usually requires high-quality chemicals with outstanding purity (>99%). We developed an economically feasible PbI2 precursor with around 1/20 cost-down for perovskite/perovskite quantum dots through recrystallization and/or hydrothermal purification. Following the methodology, the quantum dots from both as-prepared and purified PbI2 demonstrated identical photophysical properties, with a photoluminescence quantum yield (PLQY) of 52.61% using the purified PbI2 vs. 45.83% PLQY using commercial PbI2. The role of hydrothermal energy was also checked against the problematic PbI2, and we checked whether the hydrothermal energy could contribute to the hindrance of undesired particle formation in the precursor solution, which enables them to form enlarged grain size from 179 ± 80 to 255 ± 130 nm for higher photoconversion efficiency of perovskite solar cells from 14.77 ± 1.82% to 15.18 ± 1.92%.

scholarly journals NaI Doping Effect on Photophysical Properties of Organic-Lead-Halide Perovskite Thin Films by Using Solution Process

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Chuangchuang Chang ◽  
Xiaoping Zou ◽  
Jin Cheng ◽  
Ying Yang ◽  
Yujun Yao ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Perovskite Solar Cells ◽  
Solution Process ◽  
Precursor Solution ◽  
Critical Issue ◽  
Peak Position ◽  
Semiconductor Film ◽  
Device Performance ◽  
Perovskite Layer ◽  
Organic Lead

Perovskite solar cells (PSCs) have been developed rapidly in recent years. How to modify the photophysical properties of perovskite films has become the critical issue, affecting device performance. In this paper, NaI doping into the perovskite layer is attempted to modulate the photophysical properties to improve the performance of PSCs. The perovskite layer was prepared by using the one-step solution spin coating method with doping different concentrations of NaI into the perovskite precursor solution and chlorobenzene employed as the antisolvent. Experimental results show that the absorption band edge and the peak position of the PL spectrum of the doped perovskite thin film were red shifted; thus, the band gap of the semiconductor film became narrow. Doping NaI into perovskite is an effective way, by which the photophysical properties of perovskite films are well modified, thus improving device performance.

scholarly journals The Influence of the Thickness of Compact TiO2 Electron Transport Layer on the Performance of Planar CH3NH3PbI3 Perovskite Solar Cells

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3295
Author(s):  
Andrzej Sławek ◽  
Zbigniew Starowicz ◽  
Marek Lipiński
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Short Circuit ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Precursor Solution ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Transport Layer ◽  
Electron Transport Layer

In recent years, lead halide perovskites have attracted considerable attention from the scientific community due to their exceptional properties and fast-growing enhancement for solar energy harvesting efficiency. One of the fundamental aspects of the architecture of perovskite-based solar cells (PSCs) is the electron transport layer (ETL), which also acts as a barrier for holes. In this work, the influence of compact TiO2 ETL on the performance of planar heterojunction solar cells based on CH3NH3PbI3 perovskite was investigated. ETLs were deposited on fluorine-doped tin oxide (FTO) substrates from a titanium diisopropoxide bis(acetylacetonate) precursor solution using the spin-coating method with changing precursor concentration and centrifugation speed. It was found that the thickness and continuity of ETLs, investigated between 0 and 124 nm, strongly affect the photovoltaic performance of PSCs, in particular short-circuit current density (JSC). Optical and topographic properties of the compact TiO2 layers were investigated as well.

scholarly journals A general approach to high-efficiency perovskite solar cells by any antisolvent

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Alexander D. Taylor ◽  
Qing Sun ◽  
Katelyn P. Goetz ◽  
Qingzhi An ◽  
Tim Schramm ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Precursor Solution ◽  
Microstructural Characterization ◽  
Application Rate ◽  
Perovskite Layer ◽  
Highly Efficient ◽  
Application Procedure ◽  
Wide Range

AbstractDeposition of perovskite films by antisolvent engineering is a highly common method employed in perovskite photovoltaics research. Herein, we report on a general method that allows for the fabrication of highly efficient perovskite solar cells by any antisolvent via manipulation of the antisolvent application rate. Through detailed structural, compositional, and microstructural characterization of perovskite layers fabricated by 14 different antisolvents, we identify two key factors that influence the quality of the perovskite layer: the solubility of the organic precursors in the antisolvent and its miscibility with the host solvent(s) of the perovskite precursor solution, which combine to produce rate-dependent behavior during the antisolvent application step. Leveraging this, we produce devices with power conversion efficiencies (PCEs) that exceed 21% using a wide range of antisolvents. Moreover, we demonstrate that employing the optimal antisolvent application procedure allows for highly efficient solar cells to be fabricated from a broad range of precursor stoichiometries.

Solvent Engineering of the Precursor Solution toward Large‐Area Production of Perovskite Solar Cells

2021 ◽  
Vol 33 (14) ◽  
pp. 2005410
Author(s):  
Lingfeng Chao ◽  
Tingting Niu ◽  
Weiyin Gao ◽  
Chenxin Ran ◽  
Lin Song ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Precursor Solution ◽  
Large Area ◽  
Solvent Engineering

Film Formation Control for High Performance Dion–Jacobson 2D Perovskite Solar Cells

2021 ◽  
pp. 2002733
Author(s):  
Xu Zhang ◽  
Tinghuan Yang ◽  
Xiaodong Ren ◽  
Lu Zhang ◽  
Kui Zhao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Formation Control ◽  
High Performance ◽  
Film Formation ◽  
Perovskite Solar Cells

Rationalizing the effect of overstoichiometric PbI2 on the stability of perovskite solar cells in the context of precursor solution formulation

2021 ◽  
Vol 278 ◽  
pp. 116823
Author(s):  
Mayuribala Mangrulkar ◽  
Sergey Yu. Luchkin ◽  
Azat F. Akbulatov ◽  
Ivan Zhidkov ◽  
Ernst Z. Kurmaev ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Precursor Solution ◽  
The Stability ◽  
Solution Formulation

scholarly journals Interface Engineering for Perovskite Solar Cells Based on 2D-Materials: A Physics Point of View

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5843
Author(s):  
Rosaria Verduci ◽  
Antonio Agresti ◽  
Valentino Romano ◽  
Giovanna D’Angelo
Keyword(s):  
Solar Cells ◽  
Transition Metal ◽  
2D Materials ◽  
Low Cost ◽  
Transition Metal Dichalcogenides ◽  
Perovskite Solar Cells ◽  
Precursor Solution ◽  
Point Of View ◽  
Physical Mechanisms ◽  
Metal Dichalcogenides

The last decade has witnessed the advance of metal halide perovskites as a promising low-cost and efficient class of light harvesters used in solar cells (SCs). Remarkably, the efficiency of lab-scale perovskite solar cells (PSCs) reached a power conversion efficiency of 25.5% in just ~10 years of research, rivalling the current record of 26.1% for Si-based PVs. To further boost the performances of PSCs, the use of 2D materials (such as graphene, transition metal dichalcogenides and transition metal carbides, nitrides and carbonitrides) has been proposed, thanks to their remarkable optoelectronic properties (that can be tuned with proper chemical composition engineering) and chemical stability. In particular, 2D materials have been demonstrated as promising candidates for (i) accelerating hot carrier transfer across the interfaces between the perovskite and the charge extraction layers; (ii) improving the crystallization of the perovskite layers (when used as additives in the precursor solution); (iii) favoring electronic bands alignment through tuning of the work function. In this mini-review, we discuss the physical mechanisms underlying the increased efficiency of 2D material-based PSCs, focusing on the three aforementioned effects.

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