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 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 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.

Poly(3,4 ethylenedioxythiophene): Poly(styrenesulfonate)/Iron(III) Porphyrin Supported on S and N Co-Doped Graphene Quantum Dots as a Hole Transport Layer in Polymer Solar Cells

2017 ◽  
Vol 9 (9) ◽  
pp. 1616-1625 ◽  
Author(s):  
Amirhossein Hasani ◽  
Jaber Nasrollah Gavgani ◽  
Reza Mohammadi Pashaki ◽  
Siamak Baseghi ◽  
Alireza Salehi ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Polymer Solar Cells ◽  
Graphene Quantum Dots ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Doped Graphene ◽  
Co Doped

Engineering high-performance and air-stable PBTZT-stat-BDTT-8:PC61BM/PC71BM organic solar cells

2018 ◽  
Vol 6 (14) ◽  
pp. 5746-5751 ◽  
Author(s):  
Il Jeon ◽  
Ryohei Sakai ◽  
Seungju Seo ◽  
Graham E. Morse ◽  
Hiroshi Ueno ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
High Performance ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Layer Coating

PBTZT-stat-BDTT polymer tolerates water after PEDOT:PSS hole-transport layer coating and blends with mixed C60/C70 derivative acceptors to give high air-stability and high performance.

Pre- and post-treatments free nanocomposite based hole transport layer for high performance organic solar cells with considerably enhanced reproducibility

Nano Energy ◽  
2017 ◽  
Vol 34 ◽  
pp. 76-85 ◽  
Author(s):  
Jiaqi Cheng ◽  
Xingang Ren ◽  
Hugh L. Zhu ◽  
Jian Mao ◽  
Chunjun Liang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
High Performance ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer

scholarly journals A Facile Microwave-Assisted Hydrothermal Synthesis of Graphene Quantum Dots for Organic Solar Cell Efficiency Improvement

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Thi Thu Hoang ◽  
Hoai Phuong Pham ◽  
Quang Trung Tran
Keyword(s):  
Quantum Dots ◽  
Organic Solar Cells ◽  
Energy Levels ◽  
Graphene Quantum Dots ◽  
Blue Emission ◽  
Spectroscopic Characterization ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Microwave Assisted

Carbon-based nanomaterials have successively remained at the forefront of different research fields and applications for years. Understanding of low-dimension carbon material family (CNT, fullerenes, graphene, and graphene quantum dots) has arrived at a certain extension. In this report, graphene quantum dots were synthesized from graphene oxide with a microwave-assisted hydrothermal method. Compared with conventional time-consuming hydrothermal routes, this novel method requires a much shorter time, around ten minutes. Successful formation of quantum dots derived from graphene sheets was verified with microscopic and spectroscopic characterization. Nanoparticles present a diameter of about 2-8 nm, blue emission under ultraviolet excitation, and good dispersion in polar solvents and can be collected in powder form. The synthesized graphene quantum dots were utilized as a hole transport layer in organic solar cells to enhance the cell quantum efficiency. Such quantum dots possess energy levels (Ec and Ev) relevant to HOMO and LUMO levels of conductive polymers. Mixing P3HT:PCBM polymer and graphene quantum dots of sufficient extent notably helps reduce potential difference at interfaces of the two materials. Overall efficiency consequently advances to 1.43%, an increase of more than 44% compared with pristine cells (0.99%).

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