Enhanced light harvesting with novel photon upconverted Y2CaZnO5:Er3+/Yb3+ nanophosphors for dye sensitized solar cells

Rajeswari, R.; Susmitha, K.; Jayasankar, C.K.; Raghavender, M.; Giribabu, Lingamallu

doi:10.1016/j.solener.2017.09.018

Cited by 35 publications

(17 citation statements)

References 49 publications

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“…The log diagrams between pump power versus emission intensity for the RE doped phosphor hosts have been plotted for various transitions of RE ions and depicted in our earlier report. [45] It is well known that the emission intensity (I) of the upconverted emission is related with the incident pump power (P) as:…”

Section: Upconversion (Uc)mentioning

confidence: 99%

“…J sc of 12.44 mA · cm À 2 for Er 3 + : YCZ and 13.28 mA · cm À 2 for Er 3 + / Yb 3 + : YCZ nanophosphors based DSC was observed. [45] The resultant PCE values observed are found to be either better than the other reported compounds or comparable used for spectral modification such as oxides, Y 2 O 3 : Er 3 + nanorods, [116] Gd 2 (MoO 4 ) 3 : Er/Yb [137] and fluorides LaF 3 : Er 3 + /Yb 3 + , [113] NaYF 4 : Er 3 + /Yb 3 + , [119] and NaYF 4 : Er 3 + /Yb 3 + -graphene host materials. [115] Finally, from the durability studies it is observed that the device is stable upto 800 hrs retaining > 90 % of its initial photovoltaic performance.…”

Section: P E R S O N a L A C C O U N T T H E C H E M I C A L R E C O R Dmentioning

confidence: 99%

“…The emission intensities of various transitions between the RE ions have been measured at diﬀerent pump powers for determining the UC mechanisms involved in the blue, green and the red emissions. The log diagrams between pump power versus emission intensity for the RE doped phosphor hosts have been plotted for various transitions of RE ions and depicted in our earlier report . It is well known that the emission intensity (I) of the upconverted emission is related with the incident pump power (P) as:

true I α P^{n}

…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Recent Progress and Emerging Applications of Rare Earth Doped Phosphor Materials for Dye‐Sensitized and Perovskite Solar Cells: A Review

Rajeswari

Islavath

Raghavender

et al. 2019

The Chemical Record

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Although the efficiency of Dye‐sensitized and Perovskite solar cell is still below the performance level of market dominance silicon solar cells, in last few years they have grabbed significant attention because of their fabrication ease using low‐cost materials, and henceforth these cells are considered as a promising alternative to commercial photovoltaic devices. However, third generation solar cells have significant absorption in the visible region of solar spectrum, which confines their power conversion efficiency. Subsequently, the performance of current photovoltaics is significantly hampered by the transmission loss of sub‐band‐gap photons. To overcome these issues, rare earth doped luminescent materials is the favorable route followed to convert these transmitted sub‐band‐gap photons into above‐band‐gap light, where solar cells typically have significant light‐scattering effects. Moreover, the rare earth based down/up conversion material facilitates the improvement in sensitization, light‐scattering and device stability of these devices. This review provides insight into the application of various down/up conversion materials for Dye‐sensitized and perovskite solar cell applications. Additionally, the paper discusses the techniques to improve the photovoltaic performance in terms of current density and photo voltage in detail.

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Section: Upconversion (Uc)mentioning

confidence: 99%

Section: P E R S O N a L A C C O U N T T H E C H E M I C A L R E C O R Dmentioning

confidence: 99%

true I α P^{n}

…”

Section: Introductionmentioning

confidence: 99%

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Recent Progress and Emerging Applications of Rare Earth Doped Phosphor Materials for Dye‐Sensitized and Perovskite Solar Cells: A Review

Rajeswari

Islavath

Raghavender

et al. 2019

The Chemical Record

Self Cite

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“…Other major mechanisms leading to losses in solar cells are radiative losses from recombination of electrons and holes and from voltage drop across junctions and contacts [427][428][429]. One of the major advantages of the UC and DC methods of improving PV efficiency is that it can be implemented to existing single junction PV, without adding any additional fabrication techniques to avoid current mismatch losses as in the case of tandem device [430,431]. These UC and DC layers are optically passive, while current collection architecture remains the same as in a single junction PV device.…”

Section: Uc and DC Materialsmentioning

confidence: 99%

Nanostructured photovoltaics

2019

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In this review, we begin by discussing the need for harnessing renewable energy resources in the context of global energy demands. A summary of firstand second-generation solar cells, their efficiency and grid parity is provided, followed by the need to reduce material and installation costs, and achieve higher efficiencies beyond the Shockley-Queisser limit imposed on single junction cells. We also discuss the specific advantages offered by nanomaterials in enhanced energy harvesting, what design platforms comprise nanostructured photovoltaics, and list the prominent categories of nanomaterials used in the design of third generation solar cells. We review the significant nanostructured photovoltaic platforms that have encouraging power conversion efficiencies, have the potential for long term stability (both structural and functional) and have received attention in the field. In addition to their operational principle, we highlight both their advantages and shortcomings, along with insights into possible improvements. We include alternate routes to improving power conversion efficiency, not by tuning material properties to match the solar spectrum but using additives and/or structural modifications to allow more efficient harvesting of sunlight, either by reducing losses or by altering the spectral properties. The properties of nanomaterials that make them well-suited as active materials in photovoltaic devices (broadband absorption, high quantum yield, etc.) also make them ideal candidates for luminescent solar concentrators (LSCs). These devices also harvest solar energy, but instead of directly allowing charge generation, they act as downconverters for other photovoltaic cells. We review dye, thin film, and quantum dot based LSCs that have garnered a lot of attention in recent years as these devices face a resurgence given the advances in materials science and engineering which have led to novel quantum dots and hybrid semiconductors. The review ends with where the future of nanostructured photovoltaics is headed, what device designs and materials development are needed to achieve efficiencies beyond the Shockley-Queisser limits and fulfil the goal of the 3rd and 4th generation photovoltaics.

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“…Moreover, expanding the light absorption range and enhancing the light absorption efficiency have significant effect on the PCE [22]. In fact, devices usually show moderate PCE in visible region [23], while the PCE in the ultraviolet and near-infrared regions are often limited [24]. Therefore, to extend the effective light absorption into a wider range of solar spectrum is recommended [25].…”

Section: Introductionmentioning

confidence: 99%

Enhanced performance of CdS/CdSe quantum dot-sensitized solar cells by long-persistence phosphors structural layer

Deng

et al. 2020

Sci. China Mater.

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Light absorption plays an important role in improving the power conversion efficiency (PCE) of quantum dot-sensitized solar cells (QDSSCs). In this study, a multifunctional long-persistence phosphor (LPP) layer was introduced into the CdS/CdSe QDSSCs via a simple doctor blade method. The LPP layer can simultaneously improve the light harvesting and photo charge transfer in CdS/CdSe QDSSCs. As a result, their short-circuit current and corresponding PCE are effectively enhanced. The PCE can reach up to 5.07%, which is about 24% larger than that of the conventional CdS/ CdSe QDSSCs without LPP layer. The solar cells can work in dark for a while due to the long-lasting fluorescence of the LPP layer. This research provides an effective way to improve the PCE of QDSSCs, and finds the possibility for all-weather QDSSCs.

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Enhanced light harvesting with novel photon upconverted Y2CaZnO5:Er3+/Yb3+ nanophosphors for dye sensitized solar cells

Cited by 35 publications

References 49 publications

Recent Progress and Emerging Applications of Rare Earth Doped Phosphor Materials for Dye‐Sensitized and Perovskite Solar Cells: A Review

Recent Progress and Emerging Applications of Rare Earth Doped Phosphor Materials for Dye‐Sensitized and Perovskite Solar Cells: A Review

Nanostructured photovoltaics

Enhanced performance of CdS/CdSe quantum dot-sensitized solar cells by long-persistence phosphors structural layer

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