scholarly journals Perovskite Solar Cells: Surface Ligand Management Aided by a Secondary Amine Enables Increased Synthesis Yield of CsPbI 3 Perovskite Quantum Dots and High Photovoltaic Performance (Adv. Mater. 32/2020)

2020 ◽  
Vol 32 (32) ◽  
pp. 2070243 ◽  
Author(s):  
Yao Wang ◽  
Jianyu Yuan ◽  
Xuliang Zhang ◽  
Xufeng Ling ◽  
Bryon W. Larson ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Secondary Amine ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Perovskite Quantum Dots ◽  
Surface Ligand ◽  
Synthesis Yield

scholarly journals Effects of CsSnxPb1−xI3 Quantum Dots as Interfacial Layer on Photovoltaic Performance of Carbon-Based Perovskite Solar Cells

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Chi Zhang ◽  
Zhiyuan He ◽  
Xuanhui Luo ◽  
Rangwei Meng ◽  
Mengwei Chen ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Photogenerated Electron ◽  
Depletion Region ◽  
Band Alignment ◽  
Back Surface ◽  
The One ◽  
Carbon Based

AbstractIn this work, inorganic tin-doped perovskite quantum dots (PQDs) are incorporated into carbon-based perovskite solar cells (PSCs) to improve their photovoltaic performance. On the one hand, by controlling the content of Sn2+ doping, the energy level of the tin-doped PQDs can be adjusted, to realize optimized band alignment and enhanced separation of photogenerated electron–hole pairs. On the other hand, the incorporation of tin-doped PQDs provided with a relatively high acceptor concentration due to the self-p-type doping effect is able to reduce the width of the depletion region near the back surface of the perovskite, thereby enhancing the hole extraction. Particularly, after the addition of CsSn0.2Pb0.8I3 quantum dots (QDs), improvement of the power conversion efficiency (PCE) from 12.80 to 14.22% can be obtained, in comparison with the pristine device. Moreover, the experimental results are analyzed through the simulation of the one-dimensional perovskite/tin-doped PQDs heterojunction.

scholarly journals All-inorganic quantum dot assisted enhanced charge extraction across the interfaces of bulk organo-halide perovskites for efficient and stable pin-hole free perovskite solar cells

2019 ◽  
Vol 10 (41) ◽  
pp. 9530-9541 ◽  
Author(s):  
Dibyendu Ghosh ◽  
Dhirendra K. Chaudhary ◽  
Md. Yusuf Ali ◽  
Kamlesh Kumar Chauhan ◽  
Sayan Prodhan ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Dot ◽  
Grain Boundaries ◽  
Surface Engineering ◽  
Perovskite Solar Cells ◽  
Inorganic Perovskite ◽  
Perovskite Quantum Dots ◽  
Halide Perovskites ◽  
Trapping Sites

Grain boundaries in bulk perovskite films are considered as giant trapping sites for photo-generated carriers. Surface engineering via inorganic perovskite quantum dots has been employed for creating monolithically grained, pin-hole free perovskite films.

scholarly journals Enhanced Efficiency of MAPbI3 Perovskite Solar Cells with FAPbX3 Perovskite Quantum Dots

Nanomaterials ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 121 ◽  
Author(s):  
Lung-Chien Chen ◽  
Ching-Ho Tien ◽  
Zong-Liang Tseng ◽  
Jun-Hao Ruan
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Solar Cell ◽  
Cell Structure ◽  
Short Circuit ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Perovskite Quantum Dots

We describe a method to enhance power conversion efficiency (PCE) of MAPbI3 perovskite solar cell by inserting a FAPbX3 perovskite quantum dots (QD-FAPbX3) layer. The MAPbI3 and QD-FAPbX3 layers were prepared using a simple, rapid spin-coating method in a nitrogen-filled glove box. The solar cell structure consists of ITO/PEDOT:PSS/MAPbI3/QD-FAPbX3/C60/Ag, where PEDOT:PSS, MAPbI3, QD-FAPbX3, and C60 were used as the hole transport layer, light-absorbing layer, absorption enhance layer, and electron transport layer, respectively. The MAPbI3/QD-FAPbX3 solar cells exhibit a PCE of 7.59%, an open circuit voltage (Voc) of 0.9 V, a short-circuit current density (Jsc) of 17.4 mA/cm2, and a fill factor (FF) of 48.6%, respectively.

Tailoring interfacial carrier dynamics via rationally designed uniform CsPbBrxI3−x quantum dots for high-efficiency perovskite solar cells

2020 ◽  
Vol 8 (48) ◽  
pp. 26098-26108
Author(s):  
Shuguang Zhang ◽  
Young Jun Yoon ◽  
Xun Cui ◽  
Yajing Chang ◽  
Meng Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
High Efficiency ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Carrier Dynamics

The photovoltaic performance of perovskite solar cells is enhanced by interfacing with rationally designed CsPbBrxI3−x quantum dots.

scholarly journals Surface modification induced by perovskite quantum dots for triple-cation perovskite solar cells

Nano Energy ◽  
2020 ◽  
Vol 67 ◽  
pp. 104189 ◽  
Author(s):  
Wenqiang Yang ◽  
Rui Su ◽  
Deying Luo ◽  
Qin Hu ◽  
Feng Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Surface Modification ◽  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Perovskite Quantum Dots

Efficient chromium ion passivated CsPbCl3:Mn perovskite quantum dots for photon energy conversion in perovskite solar cells

2020 ◽  
Vol 8 (35) ◽  
pp. 12323-12329
Author(s):  
Donglei Zhou ◽  
Li Tao ◽  
Zhongzheng Yu ◽  
Jiannan Jiao ◽  
Wen Xu
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Energy Conversion ◽  
Photon Energy ◽  
Perovskite Solar Cells ◽  
Chromium Ion ◽  
Perovskite Quantum Dots

The efficient Cr3+ passivated CsPbCl3:Mn2+ perovskite quantum dots were used to enhance the performance of perovskite solar cells.

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%.

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