Optics of Perovskite Solar Cell Front Contacts

Hossain, Mohammad Ismail; Hongsingthong, Aswin; Qarony, Wayesh; Sichanugrist, Porponth; Konagai, Makoto; Salleo, Alberto; Knipp, Dietmar

doi:10.1021/acsami.8b16586

Cited by 36 publications

(33 citation statements)

References 42 publications

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“…For example, such textures can be fabricated by metal-organic chemical vapor deposition (MOCVD). [42] A detailed description of the realization of such metal oxide front contacts is provided in the literature. [42] However, other fabrication methods can be used as well, like sputtering, in combination with wet chemical etching or pulse layer deposition.…”

Section: Resultsmentioning

confidence: 99%

“…[42] A detailed description of the realization of such metal oxide front contacts is provided in the literature. [42] However, other fabrication methods can be used as well, like sputtering, in combination with wet chemical etching or pulse layer deposition. [58,59] The dimensions of the pyramidal surface texture can be described by the period and the height of the pyramid.…”

Section: Resultsmentioning

confidence: 99%

“…This can be done by improving light incoupling in the solar cell. [41,42] Until now, most studies have been focusing on device performance and stability by investigating several electronic carrier transport layer materials. However, very few of the studies have been conducted in investigating the effect of those transport layers on the optical and electrical properties of the devices to improve J SC s and ECEs.…”

Section: Introductionmentioning

confidence: 99%

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Electrical and Optical Properties of Nickel‐Oxide Films for Efficient Perovskite Solar Cells

et al. 2020

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Efficient hole transport layer (HTL) is crucial for realizing efficient perovskite solar cells (PSCs). In this study, nickel‐oxide (NiOX) thin‐films are investigated as a potential HTL for PSCs. The NiOX films are prepared by electron‐beam physical vapor deposition at low temperatures. The crystalline properties and the work function are determined by X‐ray diffraction and photoelectric yield spectroscopy. The transmission and the complex refractive index of the films are determined by optical spectroscopy and ellipsometry. Furthermore, PSCs are fabricated and characterized. The short‐circuit current density (Jsc) of the PSC is limited by the optical loss due to the NiOx front contact. The optical losses of the front contact are quantified by optical simulations using finite‐difference time‐domain simulations, and a solar cell structure with improved light incoupling is designed. Furthermore, the electrical characteristics of the solar cell are simulated by finite element method simulations. As a result, it is found that the optical losses can be reduced by 70%, and the light incoupling can be improved so that the JSC can be increased by up to 12%, allowing for the realization of PSCs with an energy conversion efficiency of 22%. Findings from the numerical simulations are compared with experimentally realized results.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electrical and Optical Properties of Nickel‐Oxide Films for Efficient Perovskite Solar Cells

et al. 2020

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“…The J SC of the PSC with an anti-reection coating is comparable to the PSC with a textured front contact. 15…”

Section: Perovskite Single Junction Solar Cellsmentioning

confidence: 99%

“…14 The charge transporting/blocking layers must exhibit a suitable work function, a high lateral conductivity, low absorption losses, and ideally support the incoupling of light in the solar cell. 14,15 Recently, promising results have been demonstrated by using inorganic metal oxides (zinc oxide (ZnO), nickel oxide (NiO)) as charge transport layers for the implementation of PSCs. 9,16,17 The materials fulll several of the requirements.…”

Section: Introductionmentioning

confidence: 99%

Atomic layer deposition of metal oxides for efficient perovskite single-junction and perovskite/silicon tandem solar cells

et al. 2020

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Aluminum-doped and undoped zinc oxide films were investigated as potential front and rear contacts of perovskite single and perovskite/silicon tandem solar cells. The films were prepared by atomic layer deposition (ALD) at low (<200 C) substrate temperatures. The deposited films were crystalline with a single-phase wurtzite structure and exhibit excellent uniformity and low surface roughness which was confirmed by XRD and SEM measurements. Necessary material characterizations allow for realizing highquality films with low resistivity and high optical transparency at the standard growth rate. Spectroscopic ellipsometry measurements were carried out to extract the complex refractive index of the deposited films, which were used to study the optics of perovskite single junction and perovskite/silicon tandem solar cells. The optics was investigated by three-dimensional finite-difference time-domain simulations.Guidelines are provided on how to realize perovskite solar cells exhibiting high short-circuit current densities. Furthermore, detailed guidelines are given for realizing perovskite/silicon tandem solar cells with short-circuit current densities exceeding 20 mA cm À2 and potential energy conversion efficiencies beyond 31%.

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Improved Nanophotonic Front Contact Design for High‐Performance Perovskite Single‐Junction and Perovskite/Perovskite Tandem Solar Cells

et al. 2021

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The front contact of solar cells greatly influences the optoelectronic performance of perovskite solar cells (PSCs) by controlling the coherent light propagation as well as charge transport within the device. Herein, the nanophotonic front contact consisting of multilayer nanodomes and nanoholes for high‐efficiency perovskite single‐junction and perovskite/perovskite tandem solar cells (PVK/PVK TSCs) is investigated. The optical and electrical characteristics of solar cells are investigated by conducting an advanced 3D numerical approach with the combination of finite‐difference time‐domain (FDTD) and finite‐element method (FEM) simulations embedded with the particle swarm optimization (PSO) algorithm. The numerical modeling is validated by fabricating a set of efficient PSCs, optimized to a power conversion efficiency (PCE) of 17.9%, VOC of 1.07 V, JSC of 21.8 mA cm−2 and fill factor (FF) of 77%. The nanophotonic device results in improved JSC by 10−15%, resulting from 10−15% enhanced light incoupling compared with the planar device, while also strengthening the omnidirectional capabilities at angles of illumination as high as 40°. The optimized nanophotonic front contact results in PCEs of >23% and >30% (matched JSC ≈18 mA cm−2) for single‐junction PSCs and PVK/PVK TSCs, respectively. Details of the nanophotonic front contact, device, and fabrication process are provided.

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Optics of Perovskite Solar Cell Front Contacts

Cited by 36 publications

References 42 publications

Electrical and Optical Properties of Nickel‐Oxide Films for Efficient Perovskite Solar Cells

Electrical and Optical Properties of Nickel‐Oxide Films for Efficient Perovskite Solar Cells

Atomic layer deposition of metal oxides for efficient perovskite single-junction and perovskite/silicon tandem solar cells

Improved Nanophotonic Front Contact Design for High‐Performance Perovskite Single‐Junction and Perovskite/Perovskite Tandem Solar Cells

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