Enhancement of efficiency and stability in organic solar cells by employing MoS2 transport layer, graphene electrode, and graphene quantum dots-added active layer

2021 ◽  
Vol 538 ◽  
pp. 148155 ◽  
Author(s):  
Dong Hee Shin ◽  
Chan Wook Jang ◽  
Jung Sun Ko ◽  
Suk-Ho Choi
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Active Layer ◽  
Organic Solar Cells ◽  
Graphene Quantum Dots ◽  
Transport Layer ◽  
Layer Graphene ◽  
Graphene Electrode

Heterojunction solar cells with improved power conversion efficiency using graphene quantum dots

RSC Advances ◽  
2016 ◽  
Vol 6 (112) ◽  
pp. 110493-110498 ◽  
Author(s):  
Yang Dang ◽  
Xinyang Zhang ◽  
Xin Chen ◽  
Bonan Kang ◽  
S. Ravi P. Silva
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Hydrothermal Method ◽  
Active Layer ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
Power Conversion ◽  
Graphene Quantum Dots ◽  
Heterojunction Solar Cells

The effect of incorporating graphene quantum dots (GQDs) synthesized by a hydrothermal method in the active layer of organic solar cells was investigated.

Graphene quantum dots as the hole transport layer material for high-performance organic solar cells

2013 ◽  
Vol 15 (43) ◽  
pp. 18973 ◽  
Author(s):  
Miaomiao Li ◽  
Wang Ni ◽  
Bin Kan ◽  
Xiangjian Wan ◽  
Long Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Organic Solar Cells ◽  
High Performance ◽  
Graphene Quantum Dots ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Layer Material

scholarly journals The effect of gold quantum dots/grating-coupled surface plasmons in inverted organic solar cells

2021 ◽  
Vol 8 (3) ◽  
Author(s):  
Kulrisa Kuntamung ◽  
Patrawadee Yaiwong ◽  
Chutiparn Lertvachirapaiboon ◽  
Ryousuke Ishikawa ◽  
Kazunari Shinbo ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Organic Solar Cells ◽  
Uv Light ◽  
Short Circuit ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Management Approach ◽  
Near Ultraviolet

We studied the effect of gold quantum dots (AuQDs)/grating-coupled surface plasmon resonance (GC-SPR) in inverted organic solar cells (OSCs). AuQDs are located within a GC-SPR evanescent field in inverted OSCs, indicating an interaction between GC-SPR and AuQDs' quantum effects, subsequently giving rise to improvement in the performance of inverted OSCs. The fabricated solar cell device comprises an ITO/TiO 2 /P3HT : PCBM/PEDOT : PSS : AuQD/silver grating structure. The AuQDs were loaded into a hole transport layer (PEDOT : PSS) of the inverted OSCs to increase absorption in the near-ultraviolet (UV) light region and to emit visible light into the neighbouring photoactive layer, thereby achieving light-harvesting improvement of the device. The grating structures were fabricated on P3HT:PCBM layers using a nanoimprinting technique to induce GC-SPR within the inverted OSCs. The AuQDs incorporated within the strongly enhanced GC-SPR evanescent electric field on metallic nanostructures in the inverted OSCs improved the short-circuit current and the efficiency of photovoltaic devices. In comparison with the reference OSC and OSCs with only green AuQDs or only metallic grating, the developed device indicates enhancement of up to 16% power conversion efficiency. This indicates that our light management approach allows for greater light utilization of the OSCs because of the synergistic effect of G-AuQDs and GC-SPR.

Efficiency enhancement of inverted organic solar cells by introducing PFDTBT quantum dots into PCDTBT:PC71BM active layer

2014 ◽  
Vol 15 (10) ◽  
pp. 2632-2638 ◽  
Author(s):  
Chunyu Liu ◽  
Wenbin Guo ◽  
Huimin Jiang ◽  
Liang Shen ◽  
Shengping Ruan ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Active Layer ◽  
Organic Solar Cells ◽  
Efficiency Enhancement

scholarly journals Study of Electrical Transport Properties of Thin Films Used as HTL and as Active Layer in Organic Solar Cells, through Impedance Spectroscopy Measurements

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Camilo A. Otalora ◽  
Andres F. Loaiza ◽  
Gerardo Gordillo
Keyword(s):  
Thin Films ◽  
Solar Cells ◽  
Impedance Spectroscopy ◽  
Transport Properties ◽  
Active Layer ◽  
Organic Solar Cells ◽  
Electrical Transport ◽  
Hole Transport ◽  
Transport Layer ◽  
Electrical Transport Properties

Impedance spectroscopy (IS) is used for studying the electrical transport properties of thin films used in organic solar cells with structure ITO/HTL/active layer/cathode, where PEDOT:PSS (poly(3,4-ethylenedioxythiophene):polystyrene sulfonic acid) and CuPC (tetrasulfonated copper-phthalocyanine) were investigated as HTL (hole transport layer) and P3HT:PCBM (poly-3-hexylthiophene:phenyl-C61-butyric acid methyl ester) blends prepared from mesitylene and chlorobenzene based solutions were studied as active layer and Ag and Al were used as cathode. The study allowed determining the influence of the type of solvent used for the preparation of the active layer as well as the speed at which the solvents are removed on the carriers mobility. The effect of exposing the layer of P3HT to the air on its mobility was also studied. It was established that samples of P3HT and P3HT:PCBM prepared using mesitylene as a solvent have mobility values significantly higher than those prepared from chlorobenzene which is the solvent most frequently used. It was also determined that the mobility of carriers in P3HT films strongly decreases when this sample is exposed to air. In addition, it was found that the electrical properties of P3HT:PCBM thin films can be improved by removing the solvent slowly which is achieved by increasing the pressure inside the system of spin-coating during the film growth.

scholarly journals Boosting Photovoltaic Performance in Organic Solar Cells by Manipulating the Size of MoS2 Quantum Dots as a Hole-Transport Material

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1464
Author(s):  
Kwang Hyun Park ◽  
Sunggyeong Jung ◽  
Jungmo Kim ◽  
Byoung-Min Ko ◽  
Wang-Geun Shim ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Organic Solar Cells ◽  
High Performance ◽  
Quantum Confinement Effect ◽  
Critical Role ◽  
Photovoltaic Performance ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer

The design of photoactive materials and interface engineering between organic/inorganic layers play a critical role in achieving enhanced performance in energy-harvesting devices. Two-dimensional transitional dichalcogenides (TMDs) with excellent optical and electronic properties are promising candidates in this regard. In this study, we demonstrate the fabrication of size-controlled MoS2 quantum dots (QDs) and present fundamental studies of their optical properties and their application as a hole-transport layer (HTL) in organic solar cells (OSCs). Optical and structural analyses reveal that the as-prepared MoS2 QDs show a fluorescence mechanism with respect to the quantum confinement effect and intrinsic/extrinsic states. Moreover, when incorporated into a photovoltaic device, the MoS2 QDs exhibit a significantly enhanced performance (5/10-nanometer QDs: 8.30%/7.80% for PTB7 and 10.40%/10.17% for PTB7-Th, respectively) compared to those of the reference device (7.24% for PTB7 and 9.49% for PTB7-Th). We confirm that the MoS2 QDs clearly offer enhanced transport characteristics ascribed to higher hole-mobility and smoother root mean square (Rq) as a hole-extraction material. This approach can enable significant advances and facilitate a new avenue for realizing high-performance optoelectronic devices.

scholarly journals Effective Double Electron Transport Layer Inducing Crystallization of Active Layer for Improving the Performance of Organic Solar Cells

Nanomaterials ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 15
Author(s):  
Ping Li ◽  
Lijia Chen ◽  
Xiaoyan Hu ◽  
Lirong He ◽  
Zezhuan Jiang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Double Layer ◽  
Active Layer ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
Indium Tin Oxide ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Photoelectric Conversion

Interface modification plays an important role in enhancing the photoelectric conversion efficiency and stability of organic solar cells. In this work, alkali metal lithium chloride (LiCl) was introduced between indium tin oxide and polyethyleneimine ethoxylate (PEIE) to prepare a double-layer electron transport layer. Results show that the introduction of LiCl has dual functions. The first function is that LiCl can enhance conductivity, thereby facilitating charge collection. The second function is that the double-layer electron transport layer based on LiCl can induce the crystallization of active layer, thereby enhancing charge transport. Devices with LiCl/PEIE double layer achieve a high power conversion efficiency (PCE) of 3.84%, which is 21.5% higher than that of pristine devices (the PCE of pristine devices with pure PEIE interface layer is 3.16%).

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