Chemical passivation of the perovskite layer and its real-time effect on the device performance in back-contact perovskite solar cells

2020 ◽  
Vol 38 (6) ◽  
pp. 060401 ◽  
Author(s):  
Askhat N. Jumabekov
Keyword(s):  
Solar Cells ◽  
Real Time ◽  
Perovskite Solar Cells ◽  
Time Effect ◽  
Device Performance ◽  
Back Contact ◽  
Perovskite Layer ◽  
Chemical Passivation

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.

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 Improving the Performance of Organic Lead-tin Laminated Perovskite Solar Cells From the Perspective of Device Simulation

2021 ◽  
Author(s):  
liangsheng Hao ◽  
Xuefei Wu ◽  
Huaning Wang ◽  
Yubao Song ◽  
Xinxia Ma ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Single Cell ◽  
Perovskite Solar Cells ◽  
Open Circuit ◽  
Physical Parameters ◽  
Device Performance ◽  
Perovskite Layer ◽  
Absorption Layer ◽  
Organic Lead

Abstract The toxic lead in traditional perovskite solar cells (PSCs) poses a fatal threat to the environment, and it takes time and technology to complete the transition to lead-free perovskite solar cells. In this work, we introduce a lead-tin laminated perovskite solar cell, which can obviously reduce the toxicity of lead. Our ultimate goal is to study the factors that affect the performance of the device. On the basis of reducing the lead-based perovskite layer, use SACPS-1D (solar cell capacitor simulator) to optimize the parameters to maximize the performance of the entire device. Adjusting the physical parameters, we got the power conversion efficiency (PCE) of 17.59% and 6.14% for single-cell lead-based and single-cell tin-based perovskite solar cells respectively, which are close to the experimental results. The simulation results show that under the laminated structure, the thickness of the two perovskite absorber materials based on lead and tin has a certain influence on the performance of the device. After optimization, it is determined that the best thicknesses of lead-based absorption layer (LBA) and tin-based absorption layer (TBA) are 20nm and 150nm respectively. Optimize the doping concentration of acceptor and donor of the laminated perovskite absorber layer to obtain higher PCE and open circuit voltage (VOC). The best values are 1015cm-3 and 1016cm-3 for LBA and TBA respectively. We also found that when adjusting the positions of LBA and TBA, the recombination rate under different defect densities verified that the laminated absorption layer close to the light source side dominates the device performance. Provide reference for future optimization of laminated perovskite solar cells. Considering these factors comprehensively, we optimized the device performance parameters as follows: VOC=0.9266V, JSC =19.5556 mA/cm2, FF=71.12 % and PCE=12.89%.

scholarly journals Impact of Delay Time before Annealing MAI-PbI2-DMSO Intermediate Phase on Perovskite Film Quality and Photo-Physical Properties

Crystals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 151 ◽  
Author(s):  
Yujun Yao ◽  
Xiaoping Zou ◽  
Jin Cheng ◽  
Dan Chen ◽  
Chuangchuang Chang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Physical Properties ◽  
Delay Time ◽  
High Performance ◽  
Intermediate Phase ◽  
Perovskite Solar Cells ◽  
Device Performance ◽  
Perovskite Layer ◽  
The Impact

High-performance perovskite solar cells are strongly dependent on the quality of the perovskite layer. Two-step sequential deposition of CH3NH3PbI3 (MAPbI3) films is widely used to fabricate perovskite solar cells and many factors influence the quality of perovskite films, such as the delay time before annealing the MAI-PbI2-DMSO intermediate phase, which would impact the morphology and photo-physical properties of perovskite thin films. Here, the experimental research indicates that the impact of the delay time before annealing the MAI-PbI2-DMSO intermediate phase on the quality, crystallinity, and photo-physical properties of perovskite film is crucial. During the delay process, the delay time before annealing the MAI-PbI2-DMSO intermediate phase plays an important role in the nucleation process of perovskite grains inside the intermediate phase. With the extension of the delay time before annealing, the quality of the perovskite film deteriorates, thus the photo-physical properties change. We found that after the localized liquid–liquid diffusion of MAI and PbI2, with the extension of the delay time before annealing the MAI-PbI2-DMSO intermediate phase, the nucleation number of the perovskite grains increases and the grain size becomes smaller. Therefore, with the extension of the delay time before annealing, the device performance deteriorates.

Fabrication of fully non-vacuum processed perovskite solar cells using an inorganic CuSCN hole-transporting material and carbon-back contact

2018 ◽  
Vol 2 (12) ◽  
pp. 2778-2787 ◽  
Author(s):  
Ajay K. Baranwal ◽  
Hiroyuki Kanda ◽  
Naoyuki Shibayama ◽  
Seigo Ito
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Back Contact ◽  
Perovskite Layer ◽  
Hole Transporting ◽  
Hole Transporting Material

CuSCN and carbon pastes were printed on perovskite layer.

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.

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