Pathways for solar photovoltaics

Jean, Joel; Brown, Patrick R.; Jaffe, R.L.; Buonassisi, Tonio; Bulović, Vladimir

doi:10.1039/c4ee04073b

Cited by 426 publications

(324 citation statements)

References 116 publications

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“…[1] The short-circuit current densities (J SC , <4 mA cm −2 ) and external quantum efficiencies (EQEs, <60%) have also been poor, [1,18] in spite of efforts to extend the photoconversion range of bismuth halide semiconductors (J SC < 3.4 mA cm −2 , EQE < 25%). [14] Although higher efficiencies have been reported in bismuth-and antimony-based chalcogenides, [19][20][21][22] it is important to understand whether the broader range of ns 2 compounds predicted to be defect-tolerant could also exceed 1% power conversion efficiency and reach the levels needed for commercial production after optimization.…”

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Strongly Enhanced Photovoltaic Performance and Defect Physics of Air‐Stable Bismuth Oxyiodide (BiOI)

et al. 2017

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Bismuth‐based compounds have recently gained increasing attention as potentially nontoxic and defect‐tolerant solar absorbers. However, many of the new materials recently investigated show limited photovoltaic performance. Herein, one such compound is explored in detail through theory and experiment: bismuth oxyiodide (BiOI). BiOI thin films are grown by chemical vapor transport and found to maintain the same tetragonal phase in ambient air for at least 197 d. The computations suggest BiOI to be tolerant to antisite and vacancy defects. All‐inorganic solar cells (ITO|NiOx|BiOI|ZnO|Al) with negligible hysteresis and up to 80% external quantum efficiency under select monochromatic excitation are demonstrated. The short‐circuit current densities and power conversion efficiencies under AM 1.5G illumination are nearly double those of previously reported BiOI solar cells, as well as other bismuth halide and chalcohalide photovoltaics recently explored by many groups. Through a detailed loss analysis using optical characterization, photoemission spectroscopy, and device modeling, direction for future improvements in efficiency is provided. This work demonstrates that BiOI, previously considered to be a poor photocatalyst, is promising for photovoltaics.

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Strongly Enhanced Photovoltaic Performance and Defect Physics of Air‐Stable Bismuth Oxyiodide (BiOI)

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“…7 Atualmente, as células solares são classificadas em três tipos, a saber: Células Solares de primeira, segunda e terceira gerações, as quais são diferenciadas basicamente pelos materiais e tecnologias de processamento utilizados em sua fabricação. As células solares de primeira geração, também conhecidas como células de Wafer (Figura 1), 8 são baseadas na junção pn, cujo principal exemplo são as células solares de silício cristalino, tecnologia dominante no mercado atual, que apresentam eficiências entre 15-20%, e que, apesar da queda acentuada dos preços nos últimos anos, ainda apresentam alto custo de produção e instalação. 9 As células solares de segunda geração, ou de filmes finos comerciais à base de silício amorfo, CIGS (seleneto de cobre, índio, gálio), CdTe (telureto de cádmio) ou CZTS (sulfeto de cobre, zinco, estanho), têm custo mais baixo, se comparado com as de silício cristalino, embora ainda exijam processos de produção envolvendo vácuo e tratamentos térmicos a altas temperaturas -, porém apresentam uma eficiência mais baixa que as anteriores.…”

Section: Introductionunclassified

“…Essas células envolvem a geração de múltiplos éxcitons, oferecendo a possibilidade de ultrapassar os limites teóricos de eficiência de Shockley e Queisser (S-Q), associando elevada eficiência e baixo custo. 7,8,10 Os últimos anos trouxeram uma rápida, e sem precedentes, ascensão de uma nova classe de células solares, dentro das células de terceira geração, baseadas em perovskitas. [11][12][13][14][15][16][17][18] Atualmente, a aplicação desses materiais em dispositivos fotovoltaicos tem se tornado objeto de estudo de vários grupos de pesquisa, apresentando considerável evolução na arquitetura das células solares, bem como no valor de eficiência de conversão (PCE, do inglês Power Conversion Efficiency), a qual atualmente é certificada com valor de 22,1%, de acordo com o Laboratório Nacional de Energia Renovável (NREL) dos Estados Unidos.…”

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Células Solares De Perovskitas: Uma Nova Tecnologia Emergente

et al. 2017

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Recebido em 31/01/2017; aceito em 7/8/2017; publicado na web em 02/10/2017 PEROVSKITES SOLAR CELLS: A NEW EMERGING TECHNOLOGY. Solar energy has been considered as an important source of clean and safe energy to overcome the problems associate to the burn of fossil fuels (e.g. climate changes, pollution, health problems, etc.). In the area of photovoltaics, devices that convert solar energy into electricity, perovskites solar cells (PSC) have attracted great attention due to their rapid development, high energy conversion efficiency, diversification of the processing methods and different materials. The fantastic properties of the hybrid perovskite materials, such as high absorption coefficient, direct and tunable bandgap, ambipolar charge carrier, simple preparation, etc., have quoted this technology as one the most important in this century. The rapid development of PSC has provided a significant increase in energy conversion efficiency, which was first reported, in 2009, as 3.8% and now reaches up to 22.10%, according to the National Laboratory of Renewable Energy (NREL). Many studies have been carried out to further increase the efficiency of devices and solve problems as the instability of the material, and the presence of lead, so that the PSC can be applied commercially. This paper presents a review on PSC and the major advances reported in device's architecture, preparation methods, novel materials and interface engineering.Keywords: solar cell; perovskites; perovskites solar cells. INTRODUÇÃOHá muitos anos a humanidade tem feito uso de combustíveis fósseis para satisfazer grande parte da demanda de energia. Porém, com a diminuição progressiva das reservas de combustíveis fósseis, deterioração do meio ambiente (devido ao efeito estufa), poluição do ar e água e, consequentemente, com os problemas de saúde humana associados ao aquecimento global, além das questões econômicas e políticas relacionadas à saúde e preservação do meio ambiente, o desenvolvimento de fontes alternativas de energia tem se tornado cada vez mais importante.1,2 Tendo em vista essas preocupações, a energia solar fotovoltaica pode ser considerada umas das fontes de energia alternativa mais promissora, pois provém de uma fonte abundante, limpa e segura, não gera ruídos e ainda permite a geração de energia elétrica em áreas remotas. 3A energia solar é, de uma forma ou de outra, a fonte de quase toda a energia na Terra.4 O sol fornece ao nosso planeta cerca de 10.000 vezes mais energia que o nosso consumo diário global. A energia solar pode ser convertida em calor, o qual pode ser utilizado diretamente para o abastecimento de água quente, ou em eletricidade, através do efeito fotovoltaico, nas células solares. 5,6 A constituição básica de uma célula solar é baseada em duas camadas de semicondutores (junção), sendo uma camada contendo carga positiva (p) e outra contendo carga negativa (n), que geram corrente elétrica quando expostas à radiação solar.7 Atualmente, as células solares são classificadas em três tipos, a saber: Células Solares de...

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“…CQDs are a particularly promising solar cell material for several reasons. They offer the potential for the realization of low-cost devices [16,[19][20][21][22] through their ease of manufacturing [16,23,24], air stability [25][26][27] and film flexibility [28][29][30][31][32][33][34][35], thus making them compatible with roll-to-roll fabrication techniques. Though the true costs of scaling up CQD solar cell manufacturing to the gigawatt power scale are unknown, they are expected to be similar to those for organic photovoltaics [36] because of the similarities in materials, synthesis, and growth processes involved in the two technologies.…”

Section: Introductionmentioning

confidence: 99%

Advancing colloidal quantum dot photovoltaic technology

et al. 2016

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Colloidal quantum dots (CQDs) are attractive materials for solar cells due to their low cost, ease of fabrication and spectral tunability. Progress in CQD photovoltaic technology over the past decade has resulted in power conversion efficiencies approaching 10%. In this review, we give an overview of this progress, and discuss limiting mechanisms and paths for future improvement in CQD solar cell technology. We briefly summarize nanoparticle synthesis and film processing methods and evaluate the optoelectronic properties of CQD films, including the crucial role that surface ligands play in materials performance. We give an overview of device architecture engineering in CQD solar cells. The compromise between carrier extraction and photon absorption in CQD photovoltaics is analyzed along with different strategies for overcoming this trade-off. We then focus on recent advances in absorption enhancement through innovative device design and the use of nanophotonics. Several light-trapping schemes, which have resulted in large increases in cell photocurrent, are described in detail. In particular, integrating plasmonic elements into CQD devices has emerged as a promising approach to enhance photon absorption through both near-field coupling and far-field scattering effects. We also discuss strategies for overcoming the single junction efficiency limits in CQD solar cells, including tandem architectures, multiple exciton generation and hybrid materials schemes. Finally, we offer a perspective on future directions for the field and the most promising paths for achieving higher device efficiencies.

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Pathways for solar photovoltaics

Abstract: This perspective identifies future technological directions for solar photovoltaics and examines potential limits to terawatt-scale PV deployment.

Cited by 426 publications

References 116 publications

Strongly Enhanced Photovoltaic Performance and Defect Physics of Air‐Stable Bismuth Oxyiodide (BiOI)

Strongly Enhanced Photovoltaic Performance and Defect Physics of Air‐Stable Bismuth Oxyiodide (BiOI)

Células Solares De Perovskitas: Uma Nova Tecnologia Emergente

Advancing colloidal quantum dot photovoltaic technology

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