n-type polyaniline hole-blocking layer for high-efficiency QDSC by one-pot electropolymerization and selective aprotic cation ([EMIM]+) doping

The hole blocking layer plays an important role in suppressing recombination of holes and electrons between the perovskite layer and fluorine-doped tin oxide (FTO). Morphological defects, such as cracks, at the compact TiO2 hole blocking layer due to rough FTO surface seriously affect performance of perovskite solar cells (PSCs). Herein, we employ a simple spin-coating SnO2 thin film solution to cover cracks of TiO2 hole blocking layer for PSCs. The experiment results indicate that the TiO2/SnO2 complementary composite hole blocking layer could eliminate the serious electrical current leakage existing inside the device, extremely reducing interface defects and hysteresis. Furthermore, a high efficiency of 13.52% was achieved for the device, which is the highest efficiency ever recorded in PSCs with spongy carbon film deposited on a separated FTO-substrate as composite counter electrode under one sun illumination.

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Atomic Layer Deposition of TiO2 for a High-Efficiency Hole-Blocking Layer in Hole-Conductor-Free Perovskite Solar Cells Processed in Ambient Air

ACS Applied Materials & Interfaces ◽

10.1021/acsami.6b02701 ◽

2016 ◽

Vol 8 (28) ◽

pp. 17999-18007 ◽

Cited By ~ 45

Author(s):

Hang Hu ◽

Binghai Dong ◽

Huating Hu ◽

Fengxiang Chen ◽

Mengqin Kong ◽

...

Keyword(s):

Solar Cells ◽

Atomic Layer Deposition ◽

High Efficiency ◽

Perovskite Solar Cells ◽

Atomic Layer ◽

Ambient Air ◽

Blocking Layer ◽

Layer Deposition ◽

Hole Blocking Layer

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Chlorosulfonic Acid Supported Piperidine-4-carboxylic Acid (PPCA) Functionalized Fe3O4 Nanoparticles (Fe3O4-PPCA): The Efficient, Green and Reusable Nanocatalyst for the Synthesis of Pyrazolyl Coumarin Derivatives under Solvent-Free Conditions

Combinatorial Chemistry & High Throughput Screening ◽

10.2174/1386207322666190325120715 ◽

2019 ◽

Vol 22 (2) ◽

pp. 123-128

Author(s):

Setareh Habibzadeh ◽

Hassan Ghasemnejad-Bosra ◽

Mina Haghdadi ◽

Soheila Heydari-Parastar

Keyword(s):

Carboxylic Acid ◽

Fe3o4 Nanoparticles ◽

High Efficiency ◽

Reaction Times ◽

Chlorosulfonic Acid ◽

Aromatic Aldehydes ◽

Solvent Free ◽

Magnetic Nanocatalyst ◽

One Pot ◽

Solvent Free Conditions

Background: In this study, we developed a convenient methodology for the synthesis of coumarin linked to pyrazolines and pyrano [2,3-h] coumarins linked to 3-(1,5-diphenyl-4,5- dihydro-1H-pyrazol-3-yl)-chromen-2-one derivatives using Chlorosulfonic acid supported Piperidine-4-carboxylic acid (PPCA) functionalized Fe3O4 nanoparticles (Fe3O4-PPCA) catalyst. Materials and Methods:: Fe3O4-PPCA was investigated as an efficient and magnetically recoverable Nanocatalyst for the one-pot synthesis of substituted coumarins from the reaction of coumarin with a variety of aromatic aldehydes in high to excellent yield at room temperature under solvent-free conditions. The magnetic nanocatalyst can be easily recovered by applying an external magnet device and reused for at least 10 reaction runs without considerable loss of reactivity. Results and Conclusion: The advantages of this protocol are the use of commercially available materials, simple and an inexpensive procedure, easy separation, and an eco-friendly procedure, and it shows good reaction times, good to high yields, inexpensive and practicability procedure, and high efficiency.

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Fast and high-efficiency synthesis of 2-substituted benzothiazoles via combining enzyme catalysis and photoredox catalysis in one-pot

Bioorganic Chemistry ◽

10.1016/j.bioorg.2020.104607 ◽

2020 ◽

pp. 104607

Author(s):

Zeng-Jie Yang ◽

Qing-Tian Gong ◽

Yuan Yu ◽

Wei-Fan Lu ◽

Zhe-Ning Wu ◽

...

Keyword(s):

Enzyme Catalysis ◽

High Efficiency ◽

Photoredox Catalysis ◽

One Pot

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Blue-emitting organic EL devices with a hole blocking layer

Synthetic Metals ◽

10.1016/s0379-6779(99)00407-5 ◽

2000 ◽

Vol 111-112 ◽

pp. 25-29 ◽

Cited By ~ 16

Author(s):

Y. Sato ◽

S. Ichinosawa ◽

T. Ogata ◽

M. Fugono ◽

Y. Murata

Keyword(s):

Blocking Layer ◽

Hole Blocking Layer

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Simple one-pot strategy for converting biowaste into valuable graphitized hierarchically porous biochar for high-efficiency capacitive storage

Journal of Energy Storage ◽

10.1016/j.est.2021.103259 ◽

2021 ◽

Vol 44 ◽

pp. 103259

Author(s):

Shunyang Yao ◽

Zhihua Zhang ◽

Yanmei Wang ◽

Zhen Liu ◽

Zhi Li

Keyword(s):

High Efficiency ◽

Capacitive Storage ◽

One Pot ◽

Hierarchically Porous

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Suppression of hole leakage by adding a hole blocking layer prior to the first quantum barrier in GaN-based near-ultraviolet laser diodes

physica status solidi (a) ◽

10.1002/pssa.201700320 ◽

2017 ◽

Vol 214 (10) ◽

pp. 1700320

Author(s):

Yao Xing ◽

De Gang Zhao ◽

De Sheng Jiang ◽

Xiang Li ◽

Feng Liang ◽

...

Keyword(s):

Laser Diodes ◽

Blocking Layer ◽

Ultraviolet Laser ◽

Near Ultraviolet ◽

Hole Blocking Layer

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Enhanced Efficiency and Stability in P3HT:PCBM Bulk Heterojunction Solar Cell by using TiO2 Hole Blocking Layer

MRS Proceedings ◽

10.1557/proc-0965-s11-04 ◽

2006 ◽

Vol 965 ◽

Author(s):

Osamu Yoshikawa ◽

Akinobu Hayakawa ◽

Takuya Fujieda ◽

Kaku Uehara ◽

Susumu Yoshikawa

Keyword(s):

Active Layer ◽

Bulk Heterojunction ◽

Negative Electrode ◽

Blocking Layer ◽

Bulk Heterojunction Solar Cell ◽

Hole Blocking Layer ◽

Solar Conversion ◽

Physical And Chemical ◽

Parallel Resistance ◽

Solar Conversion Efficiency

ABSTRACTInsertion of TiO2 layer between Al negative electrode and active layer of bulk-heterojunction gave a high solar conversion efficiency and high stability. The TiO2 layer was prepared by spin-coating titanium(IV)isopropoxide (Ti(OC3H7)4) on active layer of blended P3HT:PCBM. The parallel resistance (Rp) is increased by inserting TiO2 layer leading to an increase in Voc. The TiO2 layer works as a hole blocking layer and prevents the physical and chemical damages by the direct contact between P3HT:PCBM active layer and Al electrode resulting in improvement of the parallel resistance and rectification. The efficiency of P3HT:PCBM bulk heterojunction cell with TiO2 hole blocking layer attained 4.05% with a Isc 9.72 mA/cm2, Voc 0.60 V, and FF 0.70 by using optimized TiO2 film thickness and ratio of P3HT:PCBM condition.

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