Recent progress on quantum dot intermediate band solar cells

Okada, Yoshitaka; Yoshida, Katsuhisa; Yoshida, Shoji; Sogabe, Tomah

doi:10.1587/elex.10.20132007

Cited by 13 publications

(11 citation statements)

References 23 publications

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“…Light management is especially interesting for solar cells with quantum structures like multiple quantum wells (MQW), superlattices [ 57 ] or multi-stacked quantum dots [ 58 ]. Indeed, a smaller number of quantum layers is favorable for an improved carrier transport and for the reduction of dislocation density.…”

Section: New Highly Efficient Materialsmentioning

confidence: 99%

Material challenges for solar cells in the twenty-first century: directions in emerging technologies

Almosni

Delamarre

Jehl

et al. 2018

Science and Technology of Advanced Materials

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197

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Photovoltaic generation has stepped up within the last decade from outsider status to one of the important contributors of the ongoing energy transition, with about 1.7% of world electricity provided by solar cells. Progress in materials and production processes has played an important part in this development. Yet, there are many challenges before photovoltaics could provide clean, abundant, and cheap energy. Here, we review this research direction, with a focus on the results obtained within a Japan–French cooperation program, NextPV, working on promising solar cell technologies. The cooperation was focused on efficient photovoltaic devices, such as multijunction, ultrathin, intermediate band, and hot-carrier solar cells, and on printable solar cell materials such as colloidal quantum dots.

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Section: New Highly Efficient Materialsmentioning

confidence: 99%

Material challenges for solar cells in the twenty-first century: directions in emerging technologies

Almosni

Delamarre

Jehl

et al. 2018

Science and Technology of Advanced Materials

Self Cite

197

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“…180 Takata et al have reported that in a well-developed cell, 181 a 50-layers stacked InAs/GaNAs QDSC with $15.7% efficiency at 1 sun has been shown to improve to efficiency of $20.3% at 100 suns and $21.2% at 1000 suns illumination. 141 Lantratov et al have reported CPV study results by using four types of different InGaAs QDSCs: with the QD media in the middle of the i-GaAs region (i-QDSC); with the same structure but using the Bragg reflector (BR-QDSC); with the QD media between i-GaAs region and n-GaAs base (base-QDSC); and in a conventional design (without QDs) keeping the i-region width of 130 nm (conv.-SC). V OC dependence on the concentration ratio was plotted in Fig.…”

Section: Concentrated Photovoltaic (Cpv) Characterizationmentioning

confidence: 99%

Intermediate band solar cells: Recent progress and future directions

Okada

Ekins-Daukes

Kita

et al. 2015

Applied Physics Reviews

340

235

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Extensive literature and publications on intermediate band solar cells (IBSCs) are reviewed. A detailed discussion is given on the thermodynamics of solar energy conversion in IBSCs, the device physics, and the carrier dynamics processes with a particular emphasis on the two-step inter-subband absorption/recombination processes that are of paramount importance in a successful implementation high-efficiency IBSC. The experimental solar cell performance is further discussed, which has been recently demonstrated by using highly mismatched alloys and high-density quantum dot arrays and superlattice. IBSCs having widely different structures, materials, and spectral responses are also covered, as is the optimization of device parameters to achieve maximum performance.

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“…Conventional solar cells are defined here as possessing a single energy gap between the hole-and electron-conducting bands. [13][14][15][16][17] Here we report a new IB solar cell based on organic light absorbers, proposed by Ekins-Daukes and Schmidt in 2008, 12 where the intermediate band effect is achieved by energy pooling in long-lived triplet excited states, shown schematically in Fig. In IB devices, a third absorbing band or state is introduced between the valence and conduction bands, where photoexcitation into the conduction band may now occur through two means: directly by the absorption of high energy photons or by the sequential absorption of two lower-energy photons via the intermediate state.…”

Section: Introductionmentioning

confidence: 99%

An intermediate band dye-sensitised solar cell using triplet–triplet annihilation

Simpson

Clarke

MacQueen

et al. 2015

Phys. Chem. Chem. Phys.

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A new mechanism of charge photogeneration is demonstrated for the first time, based on organic molecular structures. This intermediate band approach, integrated into a dye-sensitised solar cell configuration is shown to generate charges upon illumination with low energy photons. Specifically 610 nm photoexcitation of Pt porphyrins, through a series of energy transfer steps and triplet-triplet annihilation, excites a higher energy absorption onset molecule, which is then capable of charge injection into TiO2. Transient absorption measurements reveal further detail of the processes involved.

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Recent progress on quantum dot intermediate band solar cells

Cited by 13 publications

References 23 publications

Material challenges for solar cells in the twenty-first century: directions in emerging technologies

Material challenges for solar cells in the twenty-first century: directions in emerging technologies

Intermediate band solar cells: Recent progress and future directions

An intermediate band dye-sensitised solar cell using triplet–triplet annihilation

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