Optoelectronic Properties of Layered Perovskite Solar Cells

Hailegnaw, Bekele; Paek, Sanghyun; Cho, Kyung Taek; Lee, Yonghui; Ongül, Fathi; Nazeeruddin, Mohammad Khaja; Scharber, Markus C.

doi:10.1002/solr.201900126

Cited by 14 publications

(6 citation statements)

References 27 publications

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“…Experimentally, a similar behavior has been reported for highly efficient perovskite solar cells (EQE PV > 85%), where the PL intensity is strongly reduced when operated at I SC conditions. 40 With few exceptions, the PL of organic solar cells show very little or no bias-dependence. 41 Typically, the small bias-dependent fraction of the PL signal is buried under a large bias-insensitive PL signal stemming from singlet emission of pristine donor or acceptor components.…”

Section: Discussionmentioning

confidence: 99%

Wide-bandgap organic solar cells with a novel perylene-based non-fullerene acceptor enabling open-circuit voltages beyond 1.4 V

et al. 2022

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Section: Discussionmentioning

confidence: 99%

Wide-bandgap organic solar cells with a novel perylene-based non-fullerene acceptor enabling open-circuit voltages beyond 1.4 V

et al. 2022

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“…All these processes can reduce PSC performance and need to be addressed; wilst the first two are typically associated with poor J SC and fill-factor (FF), [224] charge recombination at interfaces have been linked to reduction of V OC . [225]…”

Section: Layered Hybrid Perovskite/3d Perovskite Heterojunction Solar Cellsmentioning

confidence: 99%

“…[228,229] However, Hailegnaw et al show that there is still room for improvement where an estimated loss of ≈0.14 V in the open circuit voltage was assigned to nonradiative recombination at the interface between the 3D and LPK layers. [225] The contacting interface in the 3D perovskite, I or PbI, and its van der Waals interaction with the LPK layer are critical in determining the electrical properties and charge transfer characteristics of the LPK/3D heterojunction. The first-principle calculation study done by Liu et al predicts an enhanced carrier separation at the LPK/I interface due to a more favorable built-in electric field in the space-charge region, along with a higher interface bandgap of 1.15 eV, as compared to the LPK/ PbI interface (0.53 eV).…”

Section: Interface Engineeringmentioning

confidence: 99%

Layered Perovskites in Solar Cells: Structure, Optoelectronic Properties, and Device Design

Sirbu

Balogun

Milot

et al. 2021

Advanced Energy Materials

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optoelectronic properties akin to industrial juggernauts gallium arsenide and silicon. [1,2] Yet, the materials are compatible with solution-processing techniques such as inkjet printing and spray coating. [3] This unprecedented combination has led to the development of solar cells which already show power conversion efficiencies of over 25%, similar to state-of-the-art poly-Si and other thin-film technologies, in just over 10 years of development. [4] Hybrid perovskites are particularly interesting for indoor applications, with impressive efficiencies of over 35% demonstrated under indoor illumination which may prove a viable option to power the ever expanding Internet of Things. [5] Rather than competing with the current technology giants, perovskites can work together with other solar cell technologies in a tandem configuration. Record efficiencies of over 29% for silicon-perovskite tandem solar cells have already been reported and further progress is expected in the near future. [6] Although perovskite solar cells (PSCs) are on the verge of mass production, two main challenges remain: stability [7] and toxicity. [8] Multiple reviews already address the toxicity concern, and it will not be discussed here. [9][10][11] Layered hybrid perovskites (LPKs) have emerged as an answer to battle stability concerns. Although known for decades, LPKs have only recently been incorporated in photovoltaic (PV) applications, resulting in modest device power conversion efficiencies due to poorer optoelectronic properties. [12][13][14] However, their key advantage is the stabilizing effects of the organic interlayers, which prevents perovskite degradation. [15,16] The organic spacer inhibits ion migration which prevents the formation of irreversible degradation products. [17] Alternatively, LPKs can be deposited over the state-of-the-art perovskite materials to combine the high performance of 3D perovskites with the stabilizing properties of LPKs. [15] Here, the limiting factor is inefficient charge transport across the organic interlayer, currently preventing the full exploitation of the layered structure in PSCs.This can be approached in two ways, either by keeping the LPK layer very thin, currently the most popular approach, or by increasing the electrical conductivity of the material. [18,19] The conductivity can be enhanced through increasing the number of inorganic layers n, but this comes at the price of reduced stability. [20][21][22] The better approach is to enhance the charge transport in LPKs through the molecular engineering of the organic Layered hybrid perovskites (LPKs) have emerged as a viable solution to address perovskite stability concerns and enable their implementation in wide-scale energy harvesting. Yet, although more stable, the performance of devices incorporating LPKs still lags behind that of state-of-the-art, multication perovskite materials. This is typically assigned to their poor charge transport, currently caused by the choice of cations used within the organic layer. On balance, a compromise bet...

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“…In this regard, the integration of 2-D perovskites into PSCs plays a relevant role as surface passivation layers. More in details, the high conversion efficiency of 3-D perovskites is joined with the superior stability of 2-D perovskites by obtaining a 2-D/3-D vertical bilayer architecture [45], [46], [47], [48].…”

Section: Cell)mentioning

confidence: 99%

Highly Efficient 2D Materials Engineered Perovskite/Si Tandem Bifacial Cells Beyond 29%

Agresti

Pescetelli

Magliano

et al. 2022

IEEE J. Photovoltaics

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Perovskite/Silicon tandem technology represents a promising route to achieve 30% power conversion efficiency (PCE), by ensuring low levelized costs energy. In this article, we develop a mechanically stacked 2T perovskite/silicon tandem solar cell, with subcells independently fabricated, optimized, and subsequently coupled by contacting the back electrode of the mesoscopic perovskite top cell with the texturized and metalized front contact of the silicon bottom cell. The possibility to separately optimize the two sub-cells allows to carefully choose the most promising device structure for both top and bottom cells. Indeed, semitransparent perovskite top cell performance is boosted through the use of selected two-dimensional materials to tune the device interfaces. In addition, a protective buffer layer is used to prevent damages induced by the transparent electrode sputtering deposition over the hole transporting layer. A textured amorphous/crystalline silicon heterojunction cell fabricated with a fully industrial in-line production process is here used as state of art bottom cell. The perovskite/c-Si tandem device demonstrates remarkable PCE of 28.7%. Moreover, we demonstrate the use of a bifacial silicon bottom cell, as a viable way for overcoming the current matching constrain imposed by the 2T configuration. Here, the current generation difference between perovskite and c-Si cells is compensated by exploiting the albedo radiation thanks to the bifaciality of the commercial c-Si cell used in this article. Considering standard rear irradiation, final power generation density above 32 mW/cm 2 can be achieved, paving the way for a tandem technology customable according to the final installation site.

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Optoelectronic Properties of Layered Perovskite Solar Cells

Cited by 14 publications

References 27 publications

Wide-bandgap organic solar cells with a novel perylene-based non-fullerene acceptor enabling open-circuit voltages beyond 1.4 V

Wide-bandgap organic solar cells with a novel perylene-based non-fullerene acceptor enabling open-circuit voltages beyond 1.4 V

Layered Perovskites in Solar Cells: Structure, Optoelectronic Properties, and Device Design

Highly Efficient 2D Materials Engineered Perovskite/Si Tandem Bifacial Cells Beyond 29%

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