scholarly journals Energy Focus: Large grain size may improve efficiency of perovskite solar cells

MRS Bulletin ◽  
2015 ◽  
Vol 40 (5) ◽  
pp. 381-382
Author(s):  
Vineet Venugopal
Keyword(s):  
Grain Size ◽  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Improve Efficiency

A thiourea additive-based quadruple cation lead halide perovskite with an ultra-large grain size for efficient perovskite solar cells

Nanoscale ◽  
2019 ◽  
Vol 11 (45) ◽  
pp. 21824-21833 ◽  
Author(s):  
Jyoti V. Patil ◽  
Sawanta S. Mali ◽  
Chang Kook Hong
Keyword(s):  
Thin Films ◽  
Grain Size ◽  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Inorganic Perovskite ◽  
Halide Perovskite ◽  
Lead Halide

Controlling the grain size of the organic–inorganic perovskite thin films using thiourea additives now crossing 2 μm size with >20% power conversion efficiency.

scholarly journals Understanding the Impact of Cu-In-Ga-S Nanoparticles Compactness on Holes Transfer of Perovskite Solar Cells

Nanomaterials ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 286 ◽  
Author(s):  
Dandan Zhao ◽  
Yinghui Wu ◽  
Bao Tu ◽  
Guichuan Xing ◽  
Haifeng Li ◽  
...  
Keyword(s):  
Grain Size ◽  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Device Performance ◽  
Device Structure ◽  
Optimal Point ◽  
Hole Transfer ◽  
Coverage Ratio ◽  
The Impact

Although a compact holes-transport-layer (HTL) film has always been deemed mandatory for perovskite solar cells (PSCs), the impact their compactness on the device performance has rarely been studied in detail. In this work, based on a device structure of FTO/CIGS/perovskite/PCBM/ZrAcac/Ag, that effect was systematically investigated with respect to device performance along with photo-physics characterization tools. Depending on spin-coating speed, the grain size and coverage ratio of those CIGS films on FTO substrates can be tuned, and this can result in different hole transfer efficiencies at the anode interface. At a speed of 4000 r.p.m., the band level offset between the perovskite and CIGS modified FTO was reduced to a minimum of 0.02 eV, leading to the best device performance, with conversion efficiency of 15.16% and open-circuit voltage of 1.04 V, along with the suppression of hysteresis. We believe that the balance of grain size and coverage ratio of CIGS interlayers can be tuned to an optimal point in the competition between carrier transport and recombination at the interface based on the proposed mechanism. This paper definitely deepens our understanding of the hole transfer mechanism at the interface of PSC devices, and facilitates future design of high-performance devices.

Optical Simulation and Investigation of the Effect of Hysteresis on the Perovskite Solar Cells

NANO ◽  
2019 ◽  
Vol 14 (10) ◽  
pp. 1950127 ◽  
Author(s):  
Farhad Jahantigh ◽  
S. M. Bagher Ghorashi
Keyword(s):  
Grain Size ◽  
Solar Cells ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Perovskite Solar Cells ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer

Perovskite solar cells have recently been considered to be an auspicious candidate for the advancement of future photovoltaic research. A power conversion efficiency (PCE) as high as 22% has been reported to be reached, which can be obtained through an inexpensive and high-throughput solution process. Modeling and simulation of these cells can provide deep insights into their fundamental mechanism of performance. In this paper, two different perovskite solar cells are designed by using COMSOL Multiphysics to optimize the thickness of each layer and the overall thickness of the cell. Electric potential, electron and hole concentrations, generation rate, open-circuit voltage, short-circuit current and the output power were calculated. Finally, PCEs of 20.7% and 26.1% were predicted. Afterwards, according to the simulation results, the role of the hole transport layer (HTL) was investigated and the optimum thickness of the perovskite was measured to be 200[Formula: see text]nm for both cells. Therefore, the spin coating settings are selected so that a coating with this thickness for cell 1 is deposited. In order to compare the performance of HTM layer, solar cells with a Spiro-OMeTAD HTM and without the HTM layer in their structure were fabricated. According to the obtained photovoltaic properties, the solar cell made with Spiro-OMeTAD has a more favorable open-circuit voltage ([Formula: see text]), short-circuit current density ([Formula: see text]), fill factor (FF) and PCE compared to the cell without the HTM layer. Also, hysteresis depends strongly on the perovskite grain size, because large average grain size will lead to an increase in the grain’s contact surface area and a decrease in the density of grain boundaries. Finally, according to the results, it was concluded that, in the presence of a hole transport layer, ion transfer was better and ion accumulation was less intense, and therefore, the hysteresis decreases.

Enhanced Grain Size and Crystallinity in CH3NH3PbI3 Perovskite Films by Metal Additives to the Single-Step Solution Fabrication Process

MRS Advances ◽  
2018 ◽  
Vol 3 (55) ◽  
pp. 3237-3242 ◽  
Author(s):  
Zahrah S. Almutawah ◽  
Suneth C. Watthage ◽  
Zhaoning Song ◽  
Ramez H. Ahangharnejhad ◽  
Kamala K. Subedi ◽  
...  
Keyword(s):  
Grain Size ◽  
Solar Cells ◽  
High Performance ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Precursor Solution ◽  
Single Step ◽  
Fabrication Process ◽  
Lead Iodide ◽  
Methylammonium Lead Iodide

ABSTRACTMethods of obtaining large grain size and high crystallinity in absorber materials play an important role in fabrication of high-performance methylammonium lead iodide (MAPbI3) perovskite solar cells. Here we study the effect of adding small concentrations of Cd2+, Zn2+, and Fe2+salts to the perovskite precursor solution used in the single-step solution fabrication process. Enhanced grain size and crystallinity in MAPbI3 films were obtained by using 0.1% of Cd2+ or Zn2+in the precursor solution. Consequently, solar cells constructed with Cd- and Zn-doped perovskite films show a significant improvement in device performance. These results suggest that the process may be an effective and facile method to fabricate high-efficiency perovskite photovoltaic devices.

Semiconducting carbon nanotubes as crystal growth templates and grain bridges in perovskite solar cells

2019 ◽  
Vol 7 (21) ◽  
pp. 12987-12992 ◽  
Author(s):  
Seungju Seo ◽  
Il Jeon ◽  
Rong Xiang ◽  
Changsoo Lee ◽  
Hao Zhang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Grain Size ◽  
Solar Cells ◽  
Crystal Growth ◽  
Perovskite Solar Cells ◽  
Size Control ◽  
Grain Size Control

Grain size control and boundary passivation of perovskite films are the key to obtaining efficient perovskite solar cells.

Effect of bidentate and tridentate additives on the photovoltaic performance and stability of perovskite solar cells

2019 ◽  
Vol 7 (9) ◽  
pp. 4977-4987 ◽  
Author(s):  
Jiangzhao Chen ◽  
Seul-Gi Kim ◽  
Xiaodong Ren ◽  
Hyun Suk Jung ◽  
Nam-Gyu Park
Keyword(s):  
Grain Size ◽  
Solar Cells ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
High Quality

Fabrication of high-quality perovskite films with a large grain size and fewer defects is always crucial to achieve efficient and stable perovskite solar cells (PSCs).

Incorporating self-assembled silane-crosslinked carbon dots into perovskite solar cells to improve efficiency and stability

2020 ◽  
Vol 8 (11) ◽  
pp. 5629-5637 ◽  
Author(s):  
Zhiqi Li ◽  
Jiaxin Guo ◽  
Zhuowei Li ◽  
Wenbin Han ◽  
Guanhua Ren ◽  
...  
Keyword(s):  
Solar Cells ◽  
Carbon Dots ◽  
Carrier Transport ◽  
Perovskite Solar Cells ◽  
Tunneling Junction ◽  
Insulating Layer ◽  
Improve Efficiency ◽  
Self Assembled

An inserted C3H4Cl3F3Si insulating layer can provide a tunneling junction to conduct electrons and block holes, leading to photo-generated carrier transport and collection.

Highly efficient perovskite solar cells incorporating NiO nanotubes: increased grain size and enhanced charge extraction

2017 ◽  
Vol 5 (41) ◽  
pp. 21750-21756 ◽  
Author(s):  
Juyoung Yun ◽  
Jaemoon Jun ◽  
Haejun Yu ◽  
Kisu Lee ◽  
Jaehoon Ryu ◽  
...  
Keyword(s):  
Grain Size ◽  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Highly Efficient ◽  
Charge Extraction

Incorporating NiO NTs in perovskite films provided an enhanced grain size and charge extraction, resulting in an improved PCE of 19.3%.

Multistep spin–spray deposition of large-grain-size CH3NH3PbI3 with bilayer structure for conductive-carbon-based perovskite solar cells

2019 ◽  
Vol 19 (11) ◽  
pp. 1266-1270 ◽  
Author(s):  
Thanh-Tung Duong ◽  
Phan Huy Hoang ◽  
Luu Thi Nhan ◽  
Luong Van Duong ◽  
Man Hoai Nam ◽  
...  
Keyword(s):  
Grain Size ◽  
Solar Cells ◽  
Spray Deposition ◽  
Perovskite Solar Cells ◽  
Bilayer Structure ◽  
Carbon Based
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