scholarly journals Improving the triple-cation perovskite solar cells by two-step deposition methods with perovskite seeds

2021 ◽  
Vol 2145 (1) ◽  
pp. 012028
Author(s):  
P Phiromruk ◽  
S Chatraphorn
Keyword(s):  
Solar Cells ◽  
Spin Coating ◽  
Organic Cation ◽  
Perovskite Solar Cells ◽  
Deposition Process ◽  
Device Performance ◽  
Perovskite Layer ◽  
Cesium Ion ◽  
Ion Incorporation ◽  
Lead Halide

Abstract As of recent years, triple-cation perovskite solar cells have received immense attention due to its superior efficiency and better stability comparing to the classic single-cation perovskite solar cells such as MAPbI3 or FAPbI3. A triple-cation perovskite layer which has been used most recently is cesium-containing FAPbI3-based perovskite. One of decent approaches to fabricate the layer is spin-coating technique by using two-step deposition process in which mixed lead-halide and CsI precursor is firstly spin-coated onto a substrate, then organic cation solution is deposited on the lead-halide layer. In this work, the results show that the performance of the devices from this process is lower than expected that could be due to difficulty of cesium ion incorporation as a stabilizer for FAPbI3-based perovskite. Perovskite seeding growth is introduced to solve the problem where the process is slightly modified from conventional two-step deposition methods by adding small amount of perovskite seed precursor into PbI2 solution. The concentration of the perovskite seed in PbI2 solution was varied for 0, 7, 14 and 20% v/v. The highest average efficiency of 11.9% was obtained from 7% v/v seeding concentration. Furthermore, the device performance could be improved by using proper amount of chlorobenzene (CB) as an anti-solvent. The highest efficiency of 18.4% was achieved by using 30 µl of chlorobenzene.

Meniscus Guide Slot-Die Coating For Roll-to-Roll Perovskite Solar Cells

MRS Advances ◽  
2019 ◽  
Vol 4 (24) ◽  
pp. 1399-1407 ◽  
Author(s):  
Daniel Burkitt ◽  
Peter Greenwood ◽  
Katherine Hooper ◽  
David Richards ◽  
Vasil Stoichkov ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Deposition Process ◽  
Low Flow ◽  
Plastic Substrate ◽  
Lead Iodide ◽  
Perovskite Layer ◽  
Slot Die Coating ◽  
Roll To Roll ◽  
Slot Die

Abstract:Roll-to-roll slot-die coating with a meniscus guide is used to deposit several layers in a P-I-N perovskite solar cell stack, including the perovskite layer. The use of various length meniscus guides as part of the slot-die head allows controlled coating of these layers at a common coating speed. The length of meniscus guide used is optimised and related to the rheology of the coated ink and appropriate choice of meniscus guide length provides a way to avoid flooding of the coated area and improve coating definition. Initial coating trial results suggest the low-flow limit of slot-die coating is still applicable when using a meniscus guide, which is an important and previously unreported observation, application of this theory to meniscus guide coating provides a useful tool for rapidly determining the appropriate coating conditions that can be used as part of a manufacturing process. This is further explored through the deposition of perovskite solar cells by roll-to-roll slot-die coating. The perovskite layer is deposited using a sequential slot-die deposition process using a low toxicity dimethyl sulfoxide ink for the lead iodide layer, it is found that increasing the drying oven temperature and air flow rate can be used to improve the uniformity of the layer but this can also result in deformation of the plastic substrate. Functioning perovskite solar cells are demonstrated using this technique, but a large variation is found between device performances which is attributed to the poor uniformity of the perovskite layer and damage caused to the substrate by excessive heating.

scholarly journals Review of Interface Passivation of Perovskite Layer

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 775
Author(s):  
Yinghui Wu ◽  
Dong Wang ◽  
Jinyuan Liu ◽  
Houzhi Cai
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Interface Engineering ◽  
Perovskite Layer ◽  
Long Term Stability ◽  
Interface Passivation ◽  
Silicon Based ◽  
Lead Halide ◽  
Main Factor

Perovskite solar cells (PSCs) are the most promising substitute for silicon-based solar cells. However, their power conversion efficiency and stability must be improved. The recombination probability of the photogenerated carriers at each interface in a PSC is much greater than that of the bulk phase. The interface of a perovskite polycrystalline film is considered to be a defect-rich area, which is the main factor limiting the efficiency of a PSC. This review introduces and summarizes practical interface engineering techniques for improving the efficiency and stability of organic–inorganic lead halide PSCs. First, the effect of defects at the interface of the PSCs, the energy level alignment, and the chemical reactions on the efficiency of a PSC are summarized. Subsequently, the latest developments pertaining to a modification of the perovskite layers with different materials are discussed. Finally, the prospect of achieving an efficient PSC with long-term stability through the use of interface engineering is presented.

High reproducibility of perovskite solar cells via a complete spin-coating sequential solution deposition process

Solar Energy ◽  
2015 ◽  
Vol 122 ◽  
pp. 97-103 ◽  
Author(s):  
Zhirong Zhang ◽  
Dong Wei ◽  
Bixia Xie ◽  
Xiaopeng Yue ◽  
Meicheng Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Spin Coating ◽  
Perovskite Solar Cells ◽  
Deposition Process ◽  
High Reproducibility ◽  
Solution Deposition ◽  
Sequential Solution

scholarly journals Formation, location and beneficial role of PbI2 in lead halide perovskite solar cells

2017 ◽  
Vol 1 (1) ◽  
pp. 119-126 ◽  
Author(s):  
Tian Du ◽  
Claire H. Burgess ◽  
Jinhyun Kim ◽  
Jiaqi Zhang ◽  
James R. Durrant ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Secondary Phase ◽  
Device Performance ◽  
Beneficial Role ◽  
Secondary Phase Formation ◽  
Halide Perovskite ◽  
Lead Halide ◽  
Post Deposition

Here we report the investigation of controlled PbI2 secondary phase formation in CH3NH3PbI3 (MAPI) photovoltaics through post-deposition thermal annealing, identifying the location of PbI2 in the active layer and its beneficial role on device performance.

scholarly journals Comment on “Resolving spatial and energetic distributions of trap states in metal halide perovskite solar cells”

Science ◽  
2021 ◽  
Vol 371 (6532) ◽  
pp. eabd8014 ◽  
Author(s):  
Sandheep Ravishankar ◽  
Thomas Unold ◽  
Thomas Kirchartz
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Drive Level ◽  
Research Articles ◽  
Trap States ◽  
Perovskite Layer ◽  
Metal Halide Perovskite ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Lead Halide

Ni et al. (Research Articles, 20 March 2020, p. 1352) report bulk trap densities of 1011 cm–3 and an increase in interfacial trap densities by one to four orders of magnitude from drive-level capacitance profiling of lead halide perovskites. From electrostatic arguments, we show that the results are not trap densities but are a consequence of the geometrical capacitance and charge injection into the perovskite layer.

scholarly journals Enhanced Perovskite Solar Cell Performance by Adding Magnesium Acetate Using Two-Step Spin-Coating Method

2021 ◽  
Vol 927 (1) ◽  
pp. 012001
Author(s):  
D A Yusra ◽  
N Mufti ◽  
A F Muyasaroh ◽  
E Latifah
Keyword(s):  
Solar Cells ◽  
Spin Coating ◽  
Perovskite Solar Cells ◽  
Crystallization Rate ◽  
Lattice Parameter ◽  
Solar Simulator ◽  
Perovskite Layer ◽  
Solar Cell Performance ◽  
Coating Method ◽  
The Stability

Abstract The poor stability of perovskite materials is a problem of concern in commercialization. In this study, we investigated the doping of magnesium cations (Mg2+) in PbI2 to improve the stability and efficiency of perovskite solar cells. The doping effect of Mg2+ can increase the crystallization rate. The perovskite film fabricated structure consists of ITO/TiO2/perovskite/CuO. The fabrication method used is a two-stage spin coating. The concentrations of MgAc2 were used 0, 0.75, 1, and 1.25 mg ml−1. The characterizations used are XRD (X-Ray Diffraction), UV-Vis, SEM-EDX. While the performance of solar cells is measured using a solar simulator. The XRD pattern shows that the sample has a crystal structure of MAPbI3, PbI2, and CuO phases. The MAPbI3 lattice parameter increased with increasing Mg acetate concentration. The grain size of the perovskite layer is between 5 - 15 μm, with a thickness of about 30 μm. The efficiency of perovskite solar cells increases with the increasing concentration of MgAc2.

The introduction of a perovskite seed layer for high performance perovskite solar cells

2018 ◽  
Vol 6 (41) ◽  
pp. 20138-20144 ◽  
Author(s):  
Jaeki Jeong ◽  
Hak-Beom Kim ◽  
Yung Jin Yoon ◽  
Na Gyeong An ◽  
Seyeong Song ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Open Circuit Voltage ◽  
Perovskite Solar Cells ◽  
Open Circuit ◽  
Device Performance ◽  
Pure Crystal ◽  
Perovskite Layer ◽  
Perovskite Crystal ◽  
Planar Heterojunction

A compact seed perovskite layer (CSPL) with a p–i–n planar heterojunction structure for perovskite solar cells achieved a 19.24% power conversion efficiency with a record open circuit voltage of 1.16 V and 20.37% PCE was achieved with a CSPL assisted n–i–p structure in a pure crystal perovskite film. The CSPL assists vertical growth of the perovskite crystal to enhance device performance.

scholarly journals Influence of Solution Deposition Process on Modulating Majority Charge Carrier Type and Quality of Perovskite Thin Films for Solar Cells

Materials ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2494 ◽  
Author(s):  
Chuangchuang Chang ◽  
Xiaoping Zou ◽  
Jin Cheng ◽  
Tao Ling ◽  
Yujun Yao ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Deposition Process ◽  
Step Method ◽  
Perovskite Layer ◽  
Majority Carrier ◽  
One Step ◽  
The One

In the past ten years, extensive research has witnessed the rapid development of perovskite solar cells (PSCs) and diversified preparation processing craft. At present, the most widely used methods of preparing perovskite solar cells are the one-step method and the two-step method. The main work of this paper is to study the effect of the solution deposition process on the quality of perovskite thin films, as well as modulating majority charge carrier types. Perovskite film was prepared in air by designing different processes, which were then adequately analyzed with corresponding methods. It was demonstrated that the preparation process plays a crucial role in modulating the type of majority carrier and in achieving high-quality perovskite thin film. The one-step prepared perovskite layer is enriched in MA+, leading to a P type majority carrier type thin film. The two-step prepared perovskite layer is enriched in Pb2+, leading to a N type majority carrier type thin film. In addition, we found that the one-step method caused PbI2 residue due to component segregation, which seriously affects the interface and film quality of the perovskite layer. This work aims to modulate the majority carrier type of perovskite film through different preparation processes, which can lay the foundation for the study of homojunction perovskite solar cells to improve the device performance of PSCs.

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