Enhanced Device Performance of Bulk Heterojunction (BHJ) Hybrid Solar Cells Based on Colloidal CdSe Quantum Dots (QDs) via Optimized Hexanoic Acid-Assisted Washing Treatment

As-synthesized colloidal quantum dots (QDs) are usually covered by an organic capping ligand. These ligands provide colloidal stability by preventing QDs agglomeration. However, their inherent electrical insulation properties deliver a problem for hybrid solar cell application, disrupting charge transfer, and electron transport in conjugated polymer/QDs photoactive blends. Therefore, a surface modification of QDs is crucial before QDs are integrated into solar cell fabrication. In this work, enhancement of power conversion efficiency (PCE) in bulk heterojunction (BHJ) hybrid solar cells based on hexadecylamine- (HDA-) capped CdSe quantum dots (QDs) has been achieved via a postsynthetic hexanoic acid washing treatment. The investigation of the surface modification was performed to find the optimum of washing time and their effect on solar cell devices performance. Variation of washing time between 16 and 30 min has been conducted, and an optimum washing time was found at 22 min, resulting in a high PCE of 2.81%. The efficiency enhancement indicates improved electron transport, contributing in an increased short-circuit current density of solar cell devices.

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Efficiency enhancement for bulk-heterojunction hybrid solar cells based on acid treated CdSe quantum dots and low bandgap polymer PCPDTBT

Solar Energy Materials and Solar Cells ◽

10.1016/j.solmat.2010.12.041 ◽

2011 ◽

Vol 95 (4) ◽

pp. 1232-1237 ◽

Cited By ~ 101

Author(s):

Yunfei Zhou ◽

Michael Eck ◽

Clemens Veit ◽

Birger Zimmermann ◽

Frank Rauscher ◽

...

Keyword(s):

Quantum Dots ◽

Solar Cells ◽

Bulk Heterojunction ◽

Cdse Quantum Dots ◽

Hybrid Solar Cells ◽

Efficiency Enhancement ◽

Low Bandgap

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Improved efficiency of bulk heterojunction hybrid solar cells by utilizing CdSe quantum dot–graphene nanocomposites

Physical Chemistry Chemical Physics ◽

10.1039/c4cp01566e ◽

2014 ◽

Vol 16 (24) ◽

pp. 12251-12260 ◽

Cited By ~ 38

Author(s):

Michael Eck ◽

Chuyen Van Pham ◽

Simon Züfle ◽

Martin Neukom ◽

Martin Sessler ◽

...

Keyword(s):

Quantum Dots ◽

Graphene Oxide ◽

Solar Cells ◽

Bulk Heterojunction ◽

Power Conversion ◽

Cdse Quantum Dots ◽

Hybrid Solar Cells ◽

Graphene Nanocomposites ◽

Reduced Graphene ◽

Cdse Quantum Dot

The incorporation of nanocomposites from CdSe quantum dots and thiolated reduced graphene oxide into bulk hetrojunction hybrid solar cells increases the power conversion efficiency.

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Effect of CdSe quantum dots on the performance of hybrid solar cells based on ZnO nanorod arrays

Ceramics International ◽

10.1016/j.ceramint.2012.09.074 ◽

2013 ◽

Vol 39 (3) ◽

pp. 2975-2980 ◽

Cited By ~ 19

Author(s):

Chongyu Zhu ◽

Xinhua Pan ◽

Chunli Ye ◽

Lei Wang ◽

Zhizhen Ye ◽

...

Keyword(s):

Quantum Dots ◽

Solar Cells ◽

Cdse Quantum Dots ◽

Zno Nanorod ◽

Hybrid Solar Cells ◽

Nanorod Arrays ◽

Zno Nanorod Arrays

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An inverted ZnO/P3HT:PbS bulk-heterojunction hybrid solar cell with a CdSe quantum dot interface buffer layer

RSC Advances ◽

10.1039/d0ra02740e ◽

2020 ◽

Vol 10 (28) ◽

pp. 16693-16699 ◽

Cited By ~ 2

Author(s):

Ajith Thomas ◽

R. Vinayakan ◽

V. V. Ison

Keyword(s):

Quantum Dots ◽

Solar Cell ◽

Quantum Dot ◽

Buffer Layer ◽

Active Layer ◽

Bulk Heterojunction ◽

Hybrid Solar Cell ◽

Device Performance ◽

Cdse Quantum Dots ◽

Cdse Quantum Dot

An inverted bulk-heterojunction hybrid solar cell with the structure ITO/ZnO/P3HT:PbS/Au was prepared. The device performance was enhanced by inserting an interface buffer layer of CdSe quantum dots between the ZnO and the P3HT:PbS BHJ active layer.

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Efficient and stable planar perovskite solar cells with carbon quantum dots-doped PCBM electron transport layer

New Journal of Chemistry ◽

10.1039/c8nj06146g ◽

2019 ◽

Vol 43 (18) ◽

pp. 7130-7135 ◽

Cited By ~ 6

Author(s):

Xiaomeng Zhu ◽

Jing Sun ◽

Shuai Yuan ◽

Ning Li ◽

Zhiwen Qiu ◽

...

Keyword(s):

Quantum Dots ◽

Solar Cells ◽

Solar Cell ◽

Electron Transport ◽

Perovskite Solar Cells ◽

Carbon Quantum Dots ◽

Transport Layer ◽

Electron Transport Layer ◽

Electron Transporting Layer

The solar cell with carbon QDs-doped PCBM as its electron transporting layer shows the highest PCE of 18.1%.

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Hybrid solar cells of micro/mesoporous Zn(OH)2 and its graphite composites sensitized by CdSe quantum dots

Journal of Photonics for Energy ◽

10.1117/1.jpe.4.043098 ◽

2014 ◽

Vol 4 (1) ◽

pp. 043098 ◽

Cited By ~ 3

Author(s):

SM Z. Islam ◽

Taposh Gayen ◽

Naing Tint ◽

Lingyan Shi ◽

Amani M. Ebrahim ◽

...

Keyword(s):

Quantum Dots ◽

Solar Cells ◽

Cdse Quantum Dots ◽

Hybrid Solar Cells ◽

Graphite Composites

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Broadband-absorbing hybrid solar cells with efficiency greater than 3% based on a bulk heterojunction of PbS quantum dots and a low-bandgap polymer

Journal of Materials Chemistry A ◽

10.1039/c3ta15055k ◽

2014 ◽

Vol 2 (11) ◽

pp. 3978 ◽

Cited By ~ 39

Author(s):

Minwoo Nam ◽

Joongpil Park ◽

Sang-Wook Kim ◽

Keekeun Lee

Keyword(s):

Quantum Dots ◽

Solar Cells ◽

Bulk Heterojunction ◽

Hybrid Solar Cells ◽

Low Bandgap ◽

Pbs Quantum Dots

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Performance of Air-Stable Cs2SnI6 Perovskite as Electron Transport Layer in Inverted Bulk Heterojunction Solar Cell

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.860.28 ◽

2020 ◽

Vol 860 ◽

pp. 28-33

Author(s):

Rany Khaeroni ◽

Herman ◽

Priastuti Wulandari

Keyword(s):

Solar Cells ◽

Solar Cell ◽

Electron Transport ◽

Chemical Process ◽

Large Scale ◽

Bulk Heterojunction ◽

Short Circuit ◽

Open Circuit ◽

Transport Layer ◽

Electron Transport Layer

In recent years, perovskite material has been extensively studied due to its unique physical properties and promising application in the third generation of solar cells. In particular, Sn-based perovskite has been considered to replace Pb-based perovskite because of the toxic effects and it can lead to other serious problems related to the environment. Cs2SnI6 perovskite has been known to be synthesized in a simple chemical process and it can be produced on a large scale. Moreover, this material is also oxygen and moisture stable due to the high oxidation state of tin. In this study, we synthesize air-stable Cs2SnI6 perovskite by the use of the wet chemical process at room temperature. Next, we attempt to fabricate the inverted bulk heterojunction solar cells incorporated Cs2SnI6 as electron transport layer in the configuration of ITO/ZnO/Cs2SnI6/P3HT:PCBM/PEDOT:PSS/Ag to improve device performance. The Cs2SnI6 perovskite shows an Fm-3m space group with a cubic lattice parameter of 11.62Å confirmed by X-Ray Diffraction (XRD) measurement, while UV-Vis measurement indicates this type of perovskite has direct band gap ~3.1 eV. The fabricated solar cell device reveals the enhancement in current density at short circuit condition (Jsc) from 64.69 mA/cm2 to 77.02 mA/cm2 with the addition of 2.25 mg/ml Cs2SnI6 along with the enhancement of power conversion efficiency (PCE) from 7.05% to 9.75% as characterized by J-V measurement. In our case, the voltage at open circuit condition (Voc) of the device does not perform significant improvement. Besides, it is found that the solar cell devices are quite stable even after exposure in the air for six weeks after fabrication, as indicated by PCE performance.

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