Universal description of exciton diffusion length in organic photovoltaic cell

2015 ◽  
Vol 23 ◽  
pp. 53-56 ◽  
Author(s):  
Guangwei Xu ◽  
Nianduan Lu ◽  
Wei Wang ◽  
Nan Gao ◽  
Zhuoyu Ji ◽  
...  
Keyword(s):  
Diffusion Length ◽  
Photovoltaic Cell ◽  
Organic Photovoltaic ◽  
Organic Photovoltaic Cell ◽  
Exciton Diffusion ◽  
Exciton Diffusion Length

Probing Enhanced Exciton Diffusion in a Triplet-Sensitized Organic Photovoltaic Cell

2020 ◽  
Vol 124 (6) ◽  
pp. 3489-3495 ◽  
Author(s):  
Kaicheng Shi ◽  
Ian J. Curtin ◽  
Andrew T. Healy ◽  
Tao Zhang ◽  
Deepesh Rai ◽  
...  
Keyword(s):  
Photovoltaic Cell ◽  
Organic Photovoltaic ◽  
Organic Photovoltaic Cell ◽  
Exciton Diffusion

Peak Force Visible Microscopy for Determination of Exciton Diffusion Length in Organic Photovoltaic Blends

2018 ◽  
Author(s):  
Haomin Wang ◽  
Le Wang ◽  
Yuequn Shang ◽  
Zhijun Ning ◽  
Xiaoji Xu
Keyword(s):  
Diffusion Length ◽  
Spectroscopic Technique ◽  
Peak Force ◽  
Organic Photovoltaic ◽  
Phase Separations ◽  
Blend Films ◽  
Exciton Diffusion ◽  
Exciton Diffusion Length ◽  
Atomic Force

In this article, we developed a new nano spectroscopic technique, peak force visible (PF-vis) microscopy, which is based on the peak force tapping mode in an atomic force microscope to both visualize nanoscale morphology and estimate exciton diffusion lengths of donor domains in organic photovoltaic blends. Nano phase-separations in P3HT:PCBM and TFB:PCBM blend films were clearly revealed by PF-vis microscopy with a high spatial resolution less than 10 nm. A model that correlates PF-vis signal and the exciton diffusion length was also developed to estimate the diffusion lengths of P3HT and TFB to be 2.9±0.3 and 9.0±1.5 nm, respectively. PF-vis microscopy is expected to assist the evaluation of OPV materials, therefore accelerating the pace of innovation of OPVs.

Simulation of the Electrical Characteristics and Photon Absorption Profile of P3HT/PCBM Planar Hetero-junction Photovoltaic Cell

2018 ◽  
Vol 1 (2) ◽  
pp. 45
Author(s):  
Arin Dutta ◽  
Md. Abu Zaman ◽  
Fathema Farjana
Keyword(s):  
Solar Cell ◽  
Diffusion Length ◽  
Photovoltaic Cell ◽  
Photon Absorption ◽  
Maximum Power Density ◽  
Performance Parameters ◽  
Absorption Profile ◽  
Exciton Diffusion ◽  
Exciton Diffusion Length ◽  
20 Nm

In this research work, the performance parameters , such as fill factor (FF), external offquantum efficiency (EQE) , maximum power density and photon absorption profile of a planar hetero-junction poly 3-hexyl thiophene (P3HT) / phenyl-C61-butyric acid methyl ester (PCBM) photovoltaic cell has been simulated for different values of exciton diffusion length and thickness of donor layer where the simulation has been performed under the consideration of incident solar radiation of 1 kW/m2 irradiance , Air mass of 1.5, ambient temperature of 300K and Indium Tin Oxide (ITO) and Aluminium (Al) has been considered as the anode and cathode of the P3HT/PCBM solar cell respectively. The performance parameters and photon absorption profile of the P3HT/PCBM organic solar cell has been simulated for donor and acceptor layer thickness of 50, 60 and 70 nm and exciton diffusion length of 10, 15 and 20 nm . Finally, highest External Quantum Efficiency of 2.41% and Maximum Power Density of 24.10 W/m2 has been obtained for exciton diffusion length of 20 nm and donor thickness of 50 nm .

Peak Force Visible Microscopy for Determination of Exciton Diffusion Length in Organic Photovoltaic Blends

2018 ◽  
Author(s):  
Haomin Wang ◽  
Le Wang ◽  
Yuequn Shang ◽  
Zhijun Ning ◽  
Xiaoji Xu
Keyword(s):  
Diffusion Length ◽  
Spectroscopic Technique ◽  
Peak Force ◽  
Organic Photovoltaic ◽  
Phase Separations ◽  
Blend Films ◽  
Exciton Diffusion ◽  
Exciton Diffusion Length ◽  
Atomic Force

In this article, we developed a new nano spectroscopic technique, peak force visible (PF-vis) microscopy, which is based on the peak force tapping mode in an atomic force microscope to both visualize nanoscale morphology and estimate exciton diffusion lengths of donor domains in organic photovoltaic blends. Nano phase-separations in P3HT:PCBM and TFB:PCBM blend films were clearly revealed by PF-vis microscopy with a high spatial resolution less than 10 nm. A model that correlates PF-vis signal and the exciton diffusion length was also developed to estimate the diffusion lengths of P3HT and TFB to be 2.9±0.3 and 9.0±1.5 nm, respectively. PF-vis microscopy is expected to assist the evaluation of OPV materials, therefore accelerating the pace of innovation of OPVs.

Determining the exciton diffusion length of copper phthalocyanine in operating planar-heterojunction organic solar cells

2020 ◽  
Vol 89 (3) ◽  
pp. 30201 ◽  
Author(s):  
Xi Guan ◽  
Shiyu Wang ◽  
Wenxing Liu ◽  
Dashan Qin ◽  
Dayan Ban
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Diffusion Length ◽  
Copper Phthalocyanine ◽  
Short Circuit ◽  
Thick Layer ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Exciton Diffusion ◽  
Exciton Diffusion Length

Organic solar cells based on planar copper phthalocyanine (CuPc)/C60 heterojunction have been characterized, in which a 2 nm-thick layer of bathocuproine (BCP) is inserted into the CuPc layer. The thin layer of BCP allows hole current to tunnel it through but blocks the exciton diffusion, thereby altering the steady-state exciton profile in the CuPc zone (zone 1) sandwiched between BCP and C60. The short-circuit current density (JSC) of device is limited by the hole-exciton scattering effect at the BCP/CuPc (zone 1) interface. Based on the variation of JSC with the width of zone 1, the exciton diffusion length of CuPc is deduced to be 12.5–15 nm. The current research provides an easy and helpful method to determine the exciton diffusion lengths of organic electron donors.

Vacuum-process-based dry transfer of active layer with solvent additive for efficient organic photovoltaic devices

2017 ◽  
Vol 5 (5) ◽  
pp. 1106-1112 ◽  
Author(s):  
Jong Hwa Lee ◽  
Kang Min Kim ◽  
Woongsik Jang ◽  
Sunyong Ahn ◽  
Young Yun Kim ◽  
...  
Keyword(s):  
Active Layer ◽  
Photovoltaic Cell ◽  
Cell Performance ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Organic Photovoltaic Cell ◽  
Long Term Stability ◽  
Solvent Additive

PTB7:PC71BM-based organic photovoltaic cell with solvent additive fabricated by transferring a BHJ layer via stamping transfer. This photovoltaic cell exhibited enhanced long-term stability and similar cell performance as compared with those of the spin-coated cells.

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