scholarly journals Enhancing the short-circuit current and power conversion efficiency of polymer solar cells with graphene quantum dots derived from double-walled carbon nanotubes

2013 ◽  
Vol 5 (8) ◽  
pp. e60-e60 ◽  
Author(s):  
Fushan Li ◽  
Lijie Kou ◽  
Wei Chen ◽  
Chaoxing Wu ◽  
Tailiang Guo
Keyword(s):  
Carbon Nanotubes ◽  
Quantum Dots ◽  
Solar Cells ◽  
Polymer Solar Cells ◽  
Short Circuit ◽  
Power Conversion ◽  
Graphene Quantum Dots ◽  
Short Circuit Current ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Effect of Crystallinity on the Performance of P3HT/PC70BM/n-Dodecylthiol Polymer Solar Cells

2013 ◽  
Vol 136 (2) ◽  
Author(s):  
Nidal Abu-Zahra ◽  
Mahmoud Algazzar
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Polymer Solar Cells ◽  
Short Circuit ◽  
Power Conversion ◽  
Crystallization Rate ◽  
Short Circuit Current ◽  
Scanning Calorimetry ◽  
Avrami Model

In this research, n-dodecylthiol was added to P3HT/PC70BM polymer solar cells (PSCs) to improve the crystallinity of P3HT and enhance the phase separation of P3HT/PC70BM. Crystallinity of P3HT:PC70BM doped with 0–5% by volume of n-dodecylthiol was measured using X-ray diffraction (XRD) and differential scanning calorimetry (DSC) techniques. Both methods showed improvement in crystallinity, which resulted in improving the power conversion efficiency (PCE) of polymer solar cells by 33%. In addition, annealing at 150 °C for 30 min showed further improvement in crystallinity with n-dodecylthiol concentration up to 2%. The highest power conversion efficiency of 3.21% was achieved with polymer crystallites size L of 11.2 nm, after annealing at 150 °C for 30 min under a vacuum atmosphere. The smaller crystallite size suggests a shorter path of the charge carriers between P3HT backbones, which could be beneficial to getting a higher short circuit current in the devices made with the additive. Kinetics study of P3HT:PC70BM crystallinity using Avrami model showed a faster crystallization rate (1/t0.5) at higher temperatures.

Plasmonic-enhanced polymer photovoltaic cells based on Au nanoparticles with wide absorption spectra of 300–1000 nm

2014 ◽  
Vol 2 (43) ◽  
pp. 9303-9310 ◽  
Author(s):  
Yupei Zhang ◽  
Jingyu Hao ◽  
Xue Li ◽  
Shufen Chen ◽  
Lianhui Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Absorption Spectra ◽  
Conversion Efficiency ◽  
Au Nanoparticles ◽  
Polymer Solar Cells ◽  
Short Circuit ◽  
Power Conversion ◽  
Photovoltaic Cells ◽  
Short Circuit Current

Mixed Au nanoparticles (NPs) with wide absorption spectra of 300–1000 nm and three absorption peaks of 520, 600, and 770 nm are assembled onto the ITO anode in polymer solar cells to significantly improve the power conversion efficiency and short-circuit current by factors of 24.2% and 18.6%.

scholarly journals Enhanced Power Conversion Efficiency of P3HT : PC71BM Bulk Heterojunction Polymer Solar Cells by Doping a High-Mobility Small Organic Molecule

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Hanyu Wang ◽  
Xiao Wang ◽  
Pu Fan ◽  
Xin Yang ◽  
Junsheng Yu
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Polymer Solar Cells ◽  
Short Circuit ◽  
Power Conversion ◽  
Photovoltaic Performance ◽  
Acid Methyl Ester ◽  
High Mobility ◽  
Short Circuit Current

The effect of molecular doping with TIPS-pentacene on the photovoltaic performance of polymer solar cells (PSCs) with a structure of ITO/ZnO/poly(3-hexylthiophene-2,5-diyl) (P3HT) : [6,6]-phenyl C71-butyric acid methyl ester (PC71BM) : TIPS-pentacene/MoOx/Ag was systematically investigated by adjusting TIPS-pentacene doping ratios ranged from 0.3 to 1.2 wt%. The device with 0.6 wt% TIPS-pentacene exhibited the enhanced short-circuit current and fill factor by 1.23 mA/cm2and 7.8%, respectively, resulting in a maximum power conversion efficiency of 4.13%, which is one-third higher than that of the undoped one. The photovoltaic performance improvement was mainly due to the balanced charge carrier mobility, enhanced crystallinity, and matched cascade energy level alignment in TIPS-pentacene doped active layer, resulting in the efficient charge separation, transport, and collection.

Functionalized graphene quantum dots as a novel cathode interlayer of polymer solar cells

2016 ◽  
Vol 4 (7) ◽  
pp. 2413-2418 ◽  
Author(s):  
Zicheng Ding ◽  
Zhongshuo Miao ◽  
Zhiyuan Xie ◽  
Jun Liu
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Polymer Solar Cells ◽  
Power Conversion ◽  
Graphene Quantum Dots ◽  
Efficiency Improvement ◽  
Functionalized Graphene ◽  
Photovoltaic Efficiency ◽  
Cathode Interlayer

Graphene quantum dots functionalized with tetramethylammonium at the edge (GQDs-TMA) can be used as a cathode interlayer for polymer solar cells with high photovoltaic efficiency. A power conversion efficiency improvement from 7.51% to 8.80% is demonstrated by incorporatingGQDs-TMAas the cathode interlayer.

The Influence of Poly(phenyleneethynylene) Side Chain Structure on Single-Walled Carbon Nanotubes Hybrid Photovoltaic Cells

2008 ◽  
Vol 8 (7) ◽  
pp. 3343-3350 ◽  
Author(s):  
Jie Mao ◽  
Qian Liu ◽  
Shujing Wang ◽  
Xin Lv ◽  
Yi Huang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Short Circuit ◽  
Power Conversion ◽  
Single Walled Carbon Nanotubes ◽  
Short Circuit Current ◽  
Side Chain ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

A novel poly(phenyleneethynylene)/single walled carbon nanotubes (SWNTs) donor-acceptor nanohybrid system was constructed based on the bulk heterojunction concept, and their photovoltaic (PV) properties were studied. Comparing with that of the pristine polymer poly(phenyleneethynylene) (PPE) device, the PV performance of the SWNTs/PPE hybrid is dramatically improved. The origin of open-circuit voltage (Voc) of the pristine polymer PPE device and SWNTs/PPE device was explained by metal-insulator-metal (MIM) diode model and pinning mechanism, respectively. Furthermore, incorporation of sensitizing groups to the side chain of PPE has great effect on the photovoltaic cell performance based on these hybrid materials and both the short-circuit current density (Isc) and power conversion efficiency are significantly enhanced. It is proposed that the main reason for the increase of short circuit current is due to efficient transfer of holes by sensitizer to PPE backbone and the transfer of electrons to the SWNTs. The power conversion efficiency is enhanced by ∼1 order magnitude to 0.031% for the device based on the PPE3 with anthracene sensitizer group on the side chain compared with that (4.2 × 10−3% for SWNTs/PPE1 and 6.2 × 10−3% for SWNTs/PPE2) of the device without anthracene sensitizer on the side chain.

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