sequential deposition
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2022 ◽  
Vol 520 ◽  
pp. 230783
Author(s):  
Dae Woo Kim ◽  
Eui Dae Jung ◽  
Chung Hyeon Jang ◽  
Ji A. Hong ◽  
Hye Seung Kim ◽  
...  

Molecules ◽  
2022 ◽  
Vol 27 (2) ◽  
pp. 481
Author(s):  
Jinyu Wu ◽  
Lei Zhang ◽  
Qiao Kang ◽  
Hongxi Shi ◽  
Long Li ◽  
...  

Carbon-based hole transport material (HTM)-free perovskite solar cells have exhibited a promising commercialization prospect, attributed to their outstanding stability and low manufacturing cost. However, the serious charge recombination at the interface of the carbon counter electrode and titanium dioxide (TiO2) suppresses the improvement in the carbon-based perovskite solar cells’ performance. Here, we propose a modified sequential deposition process in air, which introduces a mixed solvent to improve the morphology of lead iodide (PbI2) film. Combined with ethanol treatment, the preferred crystallization orientation of the PbI2 film is generated. This new deposition strategy can prepare a thick and compact methylammonium lead halide (MAPbI3) film under high-humidity conditions, which acts as a natural active layer that separates the carbon counter electrode and TiO2. Meanwhile, the modified sequential deposition method provides a simple way to facilitate the conversion of the ultrathick PbI2 capping layer to MAPbI3, as the light absorption layer. By adjusting the thickness of the MAPbI3 capping layer, we achieved a power conversation efficiency (PCE) of 12.5% for the carbon-based perovskite solar cells.


Author(s):  
Jing Lu ◽  
Tinghuan Yang ◽  
Tianqi Niu ◽  
Nuo Bu ◽  
Yalan Zhang ◽  
...  

The use of layered perovskites is an important strategy to stabilize the formamidine (FA) based photoactive α-FAPbI3 phase. However, the growth mechanism of FA-based layered perovskites and its influence on...


Energies ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 8401
Author(s):  
Muneeza Ahmad ◽  
Nadia Shahzad ◽  
Muhammad Ali Tariq ◽  
Abdul Sattar ◽  
Diego Pugliese

Wide bandgap (Eg) perovskite solar cells (PSCs) are emerging as the preferred choice for top cells in a tandem architecture with crystalline silicon solar cells. Among the wide bandgap perovskites, a mixed cation mixed halide composition containing CsyFA1-yPbI3−xBrx is a popular choice because the presence of bromine widens the bandgap and addition of cesium stabilizes the crystal structure. These perovskite layers are commonly fabricated using one-step spin coating technique; however, sequential spin coating followed by dip coating has been successful in offering better control over the crystallization process for low bandgap absorber layers. In this paper, the fabrication of a Cs0.2FA0.8PbI3−xBrx perovskite absorber layer using the sequential deposition route is reported. The concentration of bromine was varied in the range 0 ≤ x ≤ 1 and optical, structural, and morphological properties of the films were studied. As the concentration was increased, the perovskite showed better crystallinity and the presence of large grains with high surface roughness, indicating the formation of the CsPbBr3 phase. Optically, the perovskite films exhibited higher absorbance in the ultraviolet (UV) range between 300 and 500 nm, hence up to x = 0.3 they can be profitably employed as a wide bandgap photon absorber layer in solar cell applications.


2021 ◽  
Vol 513 ◽  
pp. 230528
Author(s):  
Jȩdrzej Szmytkowski ◽  
Damian Glowienka ◽  
Manon Verger ◽  
Harrie Gorter ◽  
Ilker Dogan ◽  
...  

Author(s):  
Hanno Küpers ◽  
Ryan B. Lewis ◽  
Pierre Corfdir ◽  
Michael Niehle ◽  
Timur Flissikowski ◽  
...  

Author(s):  
Efat Jokar ◽  
He-Shiang Chuang ◽  
Chun-Hsiao Kuan ◽  
Hui-Ping Wu ◽  
Cheng-Hung Hou ◽  
...  

2021 ◽  
pp. 100063
Author(s):  
Qiaogan Liao ◽  
Bangbang Li ◽  
Huiliang Sun ◽  
Chang Woo Koh ◽  
Xianhe Zhang ◽  
...  

Solar RRL ◽  
2021 ◽  
Vol 5 (10) ◽  
pp. 2100592
Author(s):  
Suhyun Min ◽  
Seung Hee Han ◽  
Chanju Park ◽  
Ka Yeon Ryu ◽  
Kyungkon Kim

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