Enhanced Electro‐Optical Properties of Nanocone/Nanopillar Dual‐Structured Arrays for Ultrathin Silicon/Organic Hybrid Solar Cell Applications

He, Jiasong; Yang, Zhenhai; Li, Peipei; Wu, Sudong; Wang, Mei; Zhou, Shihong; Li, Xiaofeng; Cao, Hongtao; Ye, Jichun

doi:10.1002/aenm.201501793

Cited by 88 publications

(61 citation statements)

References 34 publications

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“…Other than the nonoptimized optoelectronic properties of PEDOT:PSS films, the main limitations to the PCEs attainable from PEDOT:PSS/n‐Si HSCs arise from the nonideal qualities of both the PEDOT:PSS/n‐Si junction and the n‐Si/Al back contact . Texturing of the Si substrate is necessary to enhance light harvesting, but is inherently challenging to the formation of conformal PEDOT:PSS/n‐Si contacts . Nonconformal PEDOT:PSS/n‐Si contacts would result in serious carrier recombination at the interface, and thus lower open‐circuit voltages ( V OC ).…”

Section: Introductionmentioning

confidence: 99%

Over 16.7% Efficiency Organic‐Silicon Heterojunction Solar Cells with Solution‐Processed Dopant‐Free Contacts for Both Polarities

Wan

Gao

et al. 2018

Adv Funct Materials

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Realization of synchronous improvement in optical management and electrical engineering is necessary to achieve high-performance photovoltaic device. However, inherent challenges are faced in organic-silicon heterojunction solar cells (HSCs) due to the poor contact property of polymer on structured silicon surface. Herein, a remarkable efficiency boost from 12.6% to over 16.7% in poly(3,4-ethylenedioxythiophene):poly(styrenesulf onate)/n-silicon (PEDOT:PSS/n-Si) HSCs by independent optimization of hole-/electron-selective contacts only relying on solution-based processes is realized. A bilayer PEDOT:PSS film with different functionalizations is utilized to synchronously realize conformal contact and effective carrier collection on textured Si surface, making the photogenerated carriers be well separated at heterojunction interface. Meanwhile, fullerene derivative is used as electrontransporting layer at the rear n-Si/Al interface to reduce the contact barrier. The study of carriers' transport and independent optimization on separately contacted layers may lead to an effective and simplified path to fabricate high-performance organic-silicon heterojunction devices.

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Section: Introductionmentioning

confidence: 99%

Over 16.7% Efficiency Organic‐Silicon Heterojunction Solar Cells with Solution‐Processed Dopant‐Free Contacts for Both Polarities

Wan

Gao

et al. 2018

Adv Funct Materials

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“…For all experiments, the same Si wafer and same surface passivation process were used, i.e., the thickness of Si wafer and the density of surface trap states are almost fixed. Therefore, the minority carrier lifetime is mainly affected by the formation of the PEDOT:PSS/Si heterojunction . The formation junction will result in a strong electrical field near the Si/PEDOT:PSS interface, which is believed to induce accumulations of holes near the n‐Si surface and produce an inversion layer.…”

Section: Resultsmentioning

confidence: 99%

Highly Conductive and Wettable PEDOT:PSS for Simple and Efficient Organic/c‐Si Planar Heterojunction Solar Cells

Chen

Feng

et al. 2020

Solar RRL

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The key for fabricating efficient organic/n‐Si planar heterojunction solar cells is the organic semiconductor layer, which governs key steps in photocarrier harvesting such as charge carrier separation and extraction. Typical organic semiconductors, however, are inadequate to yield good device performance due to their low electrical conductivities and undesirable work functions. Herein, a method is proposed to boost charge carrier concentration in poly(3,4‐ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) from 1018 to 1022 cm−3 by combining solvent p‐doping and DMF treatment. This high carrier concentration induces significant band bending in the Si substrate and thus leads to an extended inversion zone near an organic/Si heterojunction. It is found that this type of heterojunction creates a broad built‐in electric field and effective interface passivation. The highly conductive PEDOT:PSS enables a simple and efficient organic/n‐Si planar heterojunction solar cell with a power conversion efficiency exceeding 13% without using complex light‐trapping structures. This power efficiency is comparable with the highest value reported to date. Herein, the possibility of making effective organic/n‐Si planar heterojunction solar cells simply by applying a layer of extremely conductive organic coating is demonstrated.

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“…The n -type-doped Si with a thickness of 300 μm and a resistivity of 1~5 Ω·cm (i.e., doping concentration, 1.0~4.7 × 10 15 cm –3 ) was used in our experiment, which is well matched with p -type PEDOT:PSS. Detailed experimental fabrication process can be found in our previous publications [6, 8, 13, 16]. A highly conductive PEDOT:PSS with thickness of ~103 nm was spin coated on the front surface of Si to work as an antireflection and hole-conductive layer [20], as well as to form a junction [21].…”

Section: Methodsmentioning

confidence: 99%

“…In particular, a p -type polymer of poly(3,4-ethylenedioxy thiophene):polystyrenesulfonate (PEDOT:PSS) with a relatively high work function and a wide bandgap has been widely used in HHSCs as a hole-conductive material [4–7]. According to previous reports, power conversion efficiencies (PCEs) of over 13% have been achieved for PEDOT:PSS/Si HHSCs by a simple spin-coating method, demonstrating their great potentials in future photovoltaic application [8–16]. …”

Section: Introductionmentioning

confidence: 99%

Optoelectronic Evaluation and Loss Analysis of PEDOT:PSS/Si Hybrid Heterojunction Solar Cells

et al. 2017

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The organic/silicon (Si) hybrid heterojunction solar cells (HHSCs) have attracted considerable attention due to their potential advantages in high efficiency and low cost. However, as a newly arisen photovoltaic device, its current efficiency is still much worse than commercially available Si solar cells. Therefore, a comprehensive and systematical optoelectronic evaluation and loss analysis on this HHSC is therefore highly necessary to fully explore its efficiency potential. Here, a thoroughly optoelectronic simulation is provided on a typical planar polymer poly (3,4-ethylenedioxy thiophene):polystyrenesulfonate (PEDOT:PSS)/Si HHSC. The calculated spectra of reflection and external quantum efficiency (EQE) match well with the experimental results in a full-wavelength range. The losses in current density, which are contributed by both optical losses (i.e., reflection, electrode shield, and parasitic absorption) and electrical recombination (i.e., the bulk and surface recombination), are predicted via carefully addressing the electromagnetic and carrier-transport processes. In addition, the effects of Si doping concentrations and rear surface recombination velocities on the device performance are fully investigated. The results drawn in this study are beneficial to the guidance of designing high-performance PEDOT:PSS/Si HHSCs.

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Enhanced Electro‐Optical Properties of Nanocone/Nanopillar Dual‐Structured Arrays for Ultrathin Silicon/Organic Hybrid Solar Cell Applications

Cited by 88 publications

References 34 publications

Over 16.7% Efficiency Organic‐Silicon Heterojunction Solar Cells with Solution‐Processed Dopant‐Free Contacts for Both Polarities

Over 16.7% Efficiency Organic‐Silicon Heterojunction Solar Cells with Solution‐Processed Dopant‐Free Contacts for Both Polarities

Highly Conductive and Wettable PEDOT:PSS for Simple and Efficient Organic/c‐Si Planar Heterojunction Solar Cells

Optoelectronic Evaluation and Loss Analysis of PEDOT:PSS/Si Hybrid Heterojunction Solar Cells

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