Multiple exciton generation in quantum dot-based solar cells

Goodwin, Heather; Jellicoe, Tom C.; Davis, Nathaniel J. L. K.; Böhm, Marcus L.

doi:10.1515/nanoph-2017-0034

Cited by 64 publications

(41 citation statements)

References 144 publications

(258 reference statements)

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“…Important studies reveal many novel and interesting experimental and theoretical results on LDSs exhibiting high quantum yield as a result of MEG occurrence with the aim of the improvement of the solar devices field. Considering that Shockley and Queisser determined a basic threshold value for the efficiency of a traditional p-n solar cell of 30%, these essential results prove that there is a possibility to exceed the Shockley-Quiesser threshold employing quantum effects for a recently developed low-cost third-generation solar cell [77,[128][129][130].…”

Section: Excitons and Biexcitons In Zero-dimensional Semiconductor Stmentioning

confidence: 81%

Recent Advancement on the Excitonic and Biexcitonic Properties of Low-Dimensional Semiconductors

Armăşelu¹

2020

Advances in Condensed-Matter and Materials Physics - Rudimentary Research to Topical Technology

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Knowing excitonic and biexcitonic properties of low-dimensional semiconductors systems is extremely important for the discovery of new physical effects and for the development of novel optoelectronics applications. This review work furnishes an interdisciplinary analysis of the fundamental features of excitons and biexcitons in two-dimensional semiconductor structures, one-dimensional semiconductor structures, and zero-dimensional (0D) semiconductor structures. There is a focus on spectral and dynamical properties of excitons and biexcitons in quantum dots (QDs). A study of the recent advances in the field is given, emphasizing the latest theoretical results and latest experimental methods for probing exciton and biexciton dynamics. This review presents an outlook on future applications of engineered multiexcitonic states including the photovoltaics, lasing, and the utilization of QDs in quantum technologies.

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Section: Excitons and Biexcitons In Zero-dimensional Semiconductor Stmentioning

confidence: 81%

Recent Advancement on the Excitonic and Biexcitonic Properties of Low-Dimensional Semiconductors

Armăşelu¹

2020

Advances in Condensed-Matter and Materials Physics - Rudimentary Research to Topical Technology

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“…However, their contribution to the photovoltaic PCE is still modest resulting from the low MEG efficiency (η MEG ) and high MEG threshold energy ( E th ≈ 3 E g ). [ 46,75,81 ] The relationship between these variables is expressed as following [ 82,83 ]

\begin{matrix} E_{th} = E_{g} + ε_{ex} \end{matrix}

\begin{matrix} η_{MEG} = \frac{E_{g}}{ε_{ex}} \end{matrix}

\begin{matrix} ε_{ex} = \frac{h v - E_{g}}{QY - 1} \end{matrix}

where ε ex is the required excess energy for each e–h generation and E g is the semiconductor bandgap. The ε ex is determined by the exciton quantum yield (QY), which represents the number of e–h pairs excited by one photon with energy hv > 2E g , where h is Planck's constant and v is the photon frequency.…”

Section: Unique Pnc Propertiesmentioning

confidence: 99%

Metal Halide Perovskite Nanocrystal Solar Cells: Progress and Challenges

et al. 2020

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ultrasonication methods, [22] solvothermal approaches, [23] microwave-assisted synthesis, [24] and mechanical grinding. [25] PNCs not only inherit perovskite properties, but also possess the features of nanomaterials, such as their size-confinement effect and ease of processing as a colloidal ink, making PNCs suitable for incorporation into various electronic devices and compatible with printing techniques. [19,26] Moreover, nanoscale perovskites exhibit superior phase stability, particularly for CsPbI 3 and FAPbI 3 , due to their lattice construction and large surface energy. [27,28] Compared with traditional II-VI and III-V semiconductor nanocrystals, PNCs also exhibit unique properties. [29-32] Firstly, facile synthesis with inexpensive precursors can be conducted at room temperature with PNCs without inert gas protection. PNCs also have a bandgap ranging from the ultraviolet to nearinfrared, through which they can be easily tuned by size management and composition adjustment. Furthermore, they exhibit narrow bandwidth emission (<100 meV) over the entire visible range. PNCs also exhibit a fluorescence quantum yield near unity without additional passivation due to the defect-tolerance effect. Finally, they also demonstrate negligible self-absorption and Förster resonance energy transfer. These remarkable characteristics make PNCs more favorable than their bulk counterparts and traditional semiconductor nanocrystals. Thus, PNCs have promising applications in light-emitting diodes (LEDs), [33] lasers, [34] photodetectors, [35,36] and solar cells. [28] In 2016, Luther et al. first used CsPbI 3 PNCs to fabricate solar cells using a layer-by-layer approach. [28] The solar cell exhibited an extremely high open-circuit voltage (V OC) of 1.23 V, which was ≈85% of the Shockley-Queisser (S-Q) limited V OC , and a high power conversion efficiency (PCE) of 10.77%. This value was comparable to those of state-of-the-art PbS nanocrystal solar cells, [37] indicating the potential of PNC solar cells. To date, the highest PCE achieved by PNC solar cells has reached 17.39%. [38] Though PCEs have shown rapid, significant improvements, they are still limited compared to solar cells fabricated by bulk perovskite materials. Moreover, most studies on PNC solar cells have only been reported over the past two years. Research on PNC solar cells is still in its infancy, leaving substantial room for further improvement. Herein, we review the progress in the field of PNC solar cells. This review starts with detailing the unique advantages of PNCs. Next, we analyze current factors limiting their performance and Perovskite nanocrystal (PNC) solar cells have attracted increasing interest in recent years because of their excellent optoelectronic properties and unique advantages, which distinguish them from conventional nanocrystals and their bulk counterparts. This emerging type of photovoltaic is promising but faces many challenges regarding commercialization. Therefore, a comprehensive review is presented on the recent progress and current ch...

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“…Recently, a remarkably high detectivity of ~1.8 × 10 13 Jones at 1.3 µm has been reported in PbS CQD-based photodetectors [35]. Most importantly, a unique feature, “multiexciton generation”, during light absorption has been explored in CQD-based photodetectors [71,72], which has resulted in optical gain efficiency more than unity [73,74].…”

Section: Nanostructured Ir Sensitive Materials For Photodetectorsmentioning

confidence: 99%

Low-Dimensional Materials and State-of-the-Art Architectures for Infrared Photodetection

Ilyas

Song

et al. 2018

Sensors

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Infrared photodetectors are gaining remarkable interest due to their widespread civil and military applications. Low-dimensional materials such as quantum dots, nanowires, and two-dimensional nanolayers are extensively employed for detecting ultraviolet to infrared lights. Moreover, in conjunction with plasmonic nanostructures and plasmonic waveguides, they exhibit appealing performance for practical applications, including sub-wavelength photon confinement, high response time, and functionalities. In this review, we have discussed recent advances and challenges in the prospective infrared photodetectors fabricated by low-dimensional nanostructured materials. In general, this review systematically summarizes the state-of-the-art device architectures, major developments, and future trends in infrared photodetection.

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Multiple exciton generation in quantum dot-based solar cells

Cited by 64 publications

References 144 publications

Recent Advancement on the Excitonic and Biexcitonic Properties of Low-Dimensional Semiconductors

Recent Advancement on the Excitonic and Biexcitonic Properties of Low-Dimensional Semiconductors

Metal Halide Perovskite Nanocrystal Solar Cells: Progress and Challenges

Low-Dimensional Materials and State-of-the-Art Architectures for Infrared Photodetection

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