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Dual-band luminescent solar converter-coupled dye-sensitized solar cells for high performance semi-transparent photovoltaic device
摘要： We demonstrate a high-performance semi-transparent solar cell using a dye-sensitized solar cell (DSSC) coupled with a luminescent solar converter (LSC) that absorbs a dual band. We present an architecture of a sandwich-type, downshift (DS) LSC / DSSC / upconversion (UC) LSC. The DS LSC, including anthracene, converts ultraviolet light to visible light, and the UC LSC, which contains a dye pair of meso-tetraphenyl-tetrabenzoporphine palladium / 9,10-bis-penylethynyllanthrancane, converts near-infrared light into visible light. Thus, the dual band LSC improved the power conversion efficiency (PCE) of the DSSC without a significant decrease in visible transmittance. We optimize the concentration of the fluorescence dye to obtain maximum photoluminescence in each LSC. We also optimize backward scattering by introducing nanoparticle scatterers in UC LSC. The dual LSC-DSSC showed an average visible transmittance of 42% and achieved an PCE of up to 7.8%. Our incorporation of broadband-wavelength-harvestable LSCs with a DSSC presents a direction for semi-transparent photovoltaic devices.
关键词： Luminescence solar concentrator,Semi-transparent photovoltaic devices,Downshift,Photon upconversion,Dye-sensitized solar cells
更新于2025-11-19 16:46:39
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Semi-Transparent Organic Solar Cells Enabled by Sequentially Deposited Bilayer Structure
摘要： Semi-transparent organic solar cells (ST-OSCs) have been regarded as a promising candidate for building integrated photovoltaics (BIPV). In general, most of the ST-OSCs are based on bulk heterojunction (BHJ) structure, in which, the morphology of BHJ film must be delicately optimized. In this work, we introduce sequentially deposited bilayer structure into ST-OSCs by using PTB7-Th:IEICO-4F combination. The adoption of bilayer structure not only simplifies the device optimization, it is also found that, as donor and acceptor are separately deposited, the power conversion efficiency (PCE) of bilayer ST-OSCs can be improved by simply increasing the thickness of IEICO-4F, which has strong near infrared absorption but weak visible light absorption, without significantly affecting the average visible light transmittance (AVT) of device. However, in BHJ structure, the increase in BHJ film thickness unavoidably enhances the donor absorption in visible light region, leading to a tradeoff between PCE and AVT in BHJ structure ST-OSCs. Eventually, the bilayer structure device exhibits better overall performance than BHJ structure device, e.g. PCE of 8.5% for bilayer structure vs PCE of 8.1% for BHJ structure with AVT around 21%. Our findings indicate that the sequentially deposited bilayer structure, aside from its easy processing characteristic, also has great potential for preparing high performance ST-OSCs.
关键词： simplified processing,increased infrared absorption,organic solar cells,bilayer structure,semi-transparent
更新于2025-09-23 15:21:01
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Recent Advances in Plasmonic Perovskite Solar Cells
摘要： Perovskite solar cells (PSCs) have emerged recently as promising candidates for next generation photovoltaics and have reached power conversion efficiencies of 25.2%. Among the various methods to advance solar cell technologies, the implementation of nanoparticles with plasmonic effects is an alternative way for photon and charge carrier management. Surface plasmons at the interfaces or surfaces of sophisticated metal nanostructures are able to interact with electromagnetic radiation. The properties of surface plasmons can be tuned specifically by controlling the shape, size, and dielectric environment of the metal nanostructures. Thus, incorporating metallic nanostructures in solar cells is reported as a possible strategy to explore the enhancement of energy conversion efficiency mainly in semi-transparent solar cells. One particularly interesting option is PSCs with plasmonic structures enable thinner photovoltaic absorber layers without compromising their thickness while maintaining a high light harvest. In this Review, the effects of plasmonic nanostructures in electron transport material, perovskite absorbers, the hole transport material, as well as enhancement of effective refractive index of the medium and the resulting solar cell performance are presented. Aside from providing general considerations and a review of plasmonic nanostructures, the current efforts to introduce these plasmonic structures into semi-transparent solar cells are outlined.
关键词： perovskite solar cells,semi-transparent devices,plasmonic nanoparticles
更新于2025-09-23 15:21:01
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Narrow Bandpass and Efficient Semitransparent Organic Solar Cells Based on Bioinspired Spectrally Selective Electrodes
摘要： The visual aesthetic that involves color, brightness, and glossiness is of great importance for building-integrated photovoltaics. Semi-transparent organic solar cells (ST-OSCs) are thus considered as the most promising candidate due to their superiority in transparency and efficiency. However, the realization of high color purity with narrow bandpass transmitted light usually causes the severely suppressed transparency in ST-OSCs. Herein, we present a spectrally selective electrode (SSE) by imitating the integrating strategy of beetle cuticle for achieving narrow bandpass ST-OSCs with high efficiency and long-term stability. The proposed SSE allows for efficient light-selective passage, leading to tunable narrow bandpass transmitted light from violet to red. An optimized power conversion efficiency of 15.07% is achieved for colorful ST-OSCs, which exhibit color purity close to 100% and a peak transmittance approaching 30%. Long-term stability is also improved for ST-OSCs made with this SSE due to the light-rejecting and the moisture-blocking abilities. The realization of bright and colorful ST-OSCs also indicates the application potential of SSEs in light-emitting diodes, lasers, and photodetectors.
关键词： beetle cuticle,visual aesthetic,color purity,semi-transparent organic solar cells,long-term stability
更新于2025-09-23 15:21:01
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Reproducible Dry Stamping Transfer of PEDOT:PSS Transparent Top Electrode for Flexible Semi-transparent Metal Halide Perovskite Solar Cells
摘要： A semi-transparent flexible metal halide perovskite (MHP) solar cells were demonstrated by reproducible dry stamping transfer of a poly(3,4-ethylenedioxythiophene):poly(styrene sulfonic acid) (PEDOT:PSS, PH1000) transparent flexible top-electrode onto a poly(ethylene terephthalate) (PET)/ITO/PEDOT:PSS (AI4083)/MHP/[6,6]-phenyl-C61-butyric acid methyl ester (PCBM). The reproducible transfer of the PEDOT:PSS top electrode was enabled by the modification of PEDOT:PSS with poly(ethylene imine) (PEI)/2-methoxyethanol (2-MEA) solution. In addition, the PEI/2-MEA modification to PEDOT:PSS resulted in the improved conductivity and the reduced work function of top electrode. Therefore, we could fabricate highly efficient flexible semi-transparent MHP solar cells with > 13 % (active area = 1 cm2) of power conversion efficiency.
关键词： stamping transfer,perovskite solar cells,PEDOT:PSS,flexible,polyethyleneimine,semi-transparent
更新于2025-09-23 15:19:57
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Digital printing of efficient dye-sensitized solar cells (DSSCs)
摘要： This study reports on the printing of TiO2 nanoparticles and the sensitization of the photoanode by a new digital printing technology, named Digital Materials Deposition “DMD” to fabricate semi-transparent DSSCs. In this study, the push-pull dye coded “D35” and I3?/I? were used respectively as sensitizer and redox mediator. The photovoltaic performances of the solar cells printed with the DMD technology were compared to those prepared by the conventional method consisting of screen-printed nanoparticles and dying process by overnight soaking of the electrode into a solution of the sensitizer. Scanning Electron Microscopy shows that the DMD printed ?lm is more porous than the one deposited by screen printing. The cells prepared by DMD give higher solar energy conversion e?ciency (Jsc = 12.65 mA/cm2, Voc = 775 mV, FF = 75%, PEC = 7.4%) than with conventional screen-printing technique (Jsc = 10.03 mA/cm2, Voc = 760 mV, FF = 72%, PEC = 5.48%). IMVS/IMPS measurements demonstrate that the superior photocurrent density delivered by DMD printed solar cells is due to a higher charge collection e?ciency. Overall, this study demonstrates that DMD technology simpli?es the DSSC fabrication process with a reduction of the material consumption and it is quick and e?cient representing an innovative and attractive method to manufacture DSSCs.
关键词： Semi-transparent,Fast fabrication process,Dye-sensitized solar cells,Digital printing
更新于2025-09-23 15:19:57
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Possibilities of Using Semi-Transparent Photovoltaic Modules on Rooftops of Greenhouses for Covering Their Energy Needs
摘要： Semi-transparent photovoltaic cells allow the transmittance of solar irradiance through them and they have been used in building’s skylights and facades. Their use on rooftops of greenhouses can result in electricity generation which can cover part or all of their energy needs without affecting the growth of the plants. This also results in the decrease of cooling requirements during the summer since less solar irradiance is entering the greenhouse and lower CO2 emissions due to energy use in it. However, their current prices are high compared with the prices of opaque PV cells. The purpose of the present work is to investigate the possible use of semi-transparent PV modules placed on the roof of energy intensive greenhouses in Crete-Greece in order to cover their energy requirements and sell the surplus electricity into the grid. Two different cases have been studied where greenhouses of 1,000 m2 each cover their high heating needs using heat pumps and solid biomass. PV modules of 42.5 KWp can be placed on their roofs covering slightly less than 50 % of their surface allowing enough solar irradiance to enter the greenhouse. In the first case the generated electricity can cover more than 80 % of total energy needs and in the second all the energy needs offering the possibility of selling the surplus electricity to the grid. However, the current high prices of semi-transparent PVs do not favour their use by farmers since their installation costs are high. Future financial support from the government could increase their attractiveness for commercial applications in greenhouses.
关键词： greenhouses,electricity generation,cost,environmental impacts,Semi-transparent photovoltaics,energy
更新于2025-09-23 15:19:57
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All Antimony Chalcogenide Tandem Solar Cell
摘要： We demonstrate a proof-of-concept tandem solar cell using Sb2S3 and Sb2Se3 as top and bottom cell absorber materials. The band gaps of Sb2S3 and Sb2Se3 are 1.74 and 1.22 eV, perfectly satisfying the requirement of tandem solar cells. The application of few-layer graphene enables high transmittance and excellent interfacial contact in the top sub-cell. By controlling the thickness of the top cell for maximizing the spectral application, the tandem device delivers a power conversion efficiency of the 7.93%, which outperforms the individually optimized top cell (5.58%) and bottom cell (6.50%). Mechanistical investigation shows that the tandem device is able to make up voltage loss in the sub-cells, which is a critical concern in the current antimony chalcogenide solar cells. This study provides an alternative approach to enhancing the energy conversion efficiency of antimony selenosulfide.
关键词： antimony sulfide,energy conversion,semi-transparent electrode,tandem solar cell,antimony selenide
更新于2025-09-23 15:19:57
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Tuning the Color Palette of Semi-Transparent Solar Cells via Lateral ??-Extension of Polycyclic Heteroaromatics of Donora??Acceptor Dyes
摘要： Durable solar cells with tunable color and diaphaneity are very promising for building integrated photovoltaic applications. In this paper we employ donor–acceptor organic dyes U3, U4, U5, and R6 featured by polycyclic heteroaromatics 6,12-dihydroindeno[1,2-b]indeno[2',1':4,5]thieno[2,3-d]thiophene (IT2), 7,15-dihydrobenzo[6',7']indeno[2',1':4,5]thieno[3,2-b]benzo[6,7]indeno[2,1-d]thiophene (BIT2), 7,15-dihydrophenaleno[1,2-b]phenaleno[2',1':4,5]thieno[2,3-d]thiophene (PT2), and 9,19-dihydrobenzo[1',10']phenanthro[3',4':4,5]thieno[3,2-b]benzo[1,10]phenanthro[3,4-d]thiophene (BPT2) to fabricate semi-transparent dye-sensitized solar cells (DSSCs). The U3, U4, U5, and R6 based cells are goldenrod, crimson, red, and sapphire blue, with power conversion efficiencies of 3.5%, 8.2%, 7.6, and 10.1% at the AM1.5G conditions. Density functional theory calculation and voltammetric measurement reveal that lateral π-extension of polycyclic heteroaromatic brings forth a downward displacement of lowest unoccupied molecular orbital, affording a high molar extinction coefficient, low-energy gap blue dye. Femtosecond fluorescence decay measurements of dyed titania and alumina films unravel the electron injection yields of photo-excited dye molecules, which are well correlated with the maximal values of external quantum efficiencies of DSSCs. After 1,000 h full sunlight soaking at 60 oC, the red and blue DSSCs exhibit stable photocurrents, owing to the strong bonding and photochemical stability of dye molecules adsorbed on the surface of titania as well as the retention of close-to-unity electron collection yield.
关键词： electron injection,durability,tunable color,semi-transparent solar cell,lateral π-extension,photosensitizer
更新于2025-09-23 15:19:57
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Semi-Transparent Perovskite Solar Cells with a Cross-Linked Hole Transport Layer
摘要： Semi-transparent perovskite solar cells (ST-PeSCs) have received great attention because of their excellent performance and promising application in areas such as tandem devices and building integrated photovoltaics (BIPVs). Critical across all these applications is achieving both high efficiency and stable photovoltaic performance of such devices. Realizing both of these properties simultaneously has not been possible using device architectures featuring the archetypal doped Spiro-OMeTAD as a hole transport layer (HTL). As such, in this work we explore the use of a solution-processed cross-linked HTL formed from N4,N4′-di(naphthalen-1-yl)-N4,N4′-bis(4-vinylphenyl)biphenyl-4,4′-diamine (VNPB) molecules as an alternative to the conventional Spiro-OMeTAD within an FTO/SnO2/C60-SAM/Perovskite/HTL/MoOx/ultra-thin gold/MoOx ST-PeSC device architecture. Through an optimized multi-step thermal treatment process that maximizes charge extraction and reduces recombination from these devices, we can achieve ST-PeSCs that exhibit record power conversion efficiencies for Spiro-OMeTAD-free devices with average visible transmittance values between 10 and 30%. These devices exhibit comparable efficiencies to their Spiro-OMeTAD counterparts, with the additional benefit that the use of the poly-VNPB as the HTL material provides significant improvements in long-term device stability under both continuous illumination and high humidity conditions.
关键词： stability,perovskite solar cells,cross-linked layer,semi-transparent,hole transport layer,building integrated photovoltaics
更新于2025-09-23 15:19:57