Listar por autoría "b2ece2f9-134a-4444-8c74-85b7a8123095"
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A Frequency Domain Analysis of the Excitability and Bifurcations of the FitzHugh–Nagumo Neuron Model
Bisquert, Juan American Chemical Society (2021-11-18)The dynamics of neurons consist of oscillating patterns of a membrane potential that underpin the operation of biological intelligence. The FitzHugh−Nagumo (FHN) model for neuron excitability generates rich dynamical ... -
A high-capacity Li[Ni0.8Co0.06Mn0.14]O2 positive electrode with a dual concentration gradient for next-generation lithium-ion batteries
Park, Kang-Joon; Lim, Byung-Beom; Choi, Moon-Ho; Jung, Hun-Gi; Sun, Yang-Kook; Haro, Marta; Vicente-Agut, Nuria; Bisquert, Juan; Garcia-Belmonte, Germà Royal Society of Chemistry (2015-09)To increase the reversible capacity of layered lithium nickel-cobalt-manganese oxide, a Li[Ni0.8Co0.06Mn0.14]O2 positive electrode with a two-sloped full concentration gradient (TSFCG) was successfully synthesized via ... -
A perspective on the production of dye-sensitized solar modules
Fakharuddin, Azhar; Rajan, Jose; Brown, Thomas M.; Fabregat-Santiago, Francisco; Bisquert, Juan Royal Society of Chemistry (2014)Dye-sensitized solar cells (DSCs) are well researched globally due to their potential as low-cost photovoltaic (PV) devices especially suited for building and automobile integrated PV (BIPV, AIPV) and portable or indoor ... -
A review of recent results on electrochemical determination of the density of electronic states of nanostructured metal-oxide semiconductors and organic hole conductors
Bisquert, Juan; Fabregat-Santiago, Francisco; Mora-Sero, Ivan; Garcia-Belmonte, Germà; Barea, Eva M; Palomares, Emilio Elsevier (2008)The paper reviews recent results on electrochemical methods applied to the determination of the density of electronic states in several components of advanced nanostructured devices such as the dye solar cell (Grätzel ... -
A star-shaped sensitizer based on thienylenevinylene for dye-sensitized solar cells
Urbani, Maxence; Barea, Eva M; Trevisan, Roberto; Aljarilla, Ana; De la Cruz, Pilar; Bisquert, Juan; Langa, Fernando Elsevier (2013-01)A novel star-shaped dye based on highly conjugated oligothienylenevinylene (nTV) bearing pendant solubilizing hexyl chains and end-capped with three tetramethylammonium cyanoacetates as anchoring groups has been synthetized. ... -
A variable series resistance mechanism to explain the negative capacitance observed in impedance spectroscopy measurements of nanostructured solar cells
Bisquert, Juan RSC Publishing (2011-01-24)A simple model for conductivity modulation in a recombination diode is discussed to explain the observation of negative capacitance at forward bias observed in many optoelectronic devices. We formulate the basic ... -
Accelerating the Assessment of Hysteresis in Perovskite Solar Cells
Hernández-Balaguera, Enrique; Bisquert, Juan American Chemical Society (2024)Halide perovskite materials have reached important milestones in the photovoltaic field, positioning them as realistic alternatives to conventional solar cells. However, unavoidable kinetic phenomena have represented a ... -
Advances and Obstacles on Perovskite Solar Cell Research from Material Properties to Photovoltaic Functio
Bisquert, Juan; Qi, Yabing; Ma, Tingli; Yan, Yanfa American Chemical Society (2017) -
Air-stable and efficient inorganic–organic heterojunction solar cells using PbS colloidal quantum dots co-capped by 1-dodecanethiol and oleic acid
Mora-Sero, Ivan; Bisquert, Juan; Kim, Sungwoo; Im, Sang Hyuk; Kang, Meejae; Heo, Jin Hyuck; Seok, Sang Il; Kim, Sang-Wook Royal Society of Chemistry (2012)PbS colloidal quantum dot (CQD)-sensitized inorganic–organic heterojunction solar cells fabricated by using the PbS CQDs co-capped by the oleic acid (OA) and 1-dodecanethiol (DT) ligand showed better device stability ... -
Amorphous Iron Oxyhydroxide Nanosheets: Synthesis, Li Storage, and Conversion Reaction Kinetics
Xu, Chen; Zeng, Yi; Rui, Xianhong; Zhu, Jixin; Tan, Huiteng; Guerrero, Antonio; Toribio, Juan; Bisquert, Juan; Garcia-Belmonte, Germà; Yan, Qingyu American Chemical Society (2013)We present a facile approach to synthesize amorphous iron oxyhydroxide nanosheet from the surfactant-assisted oxidation of iron sulfide nanosheet. The amorphous iron oxyhydroxide nanosheet is porous and has a high surface ... -
Amorphous TiO2 Buffer Layer Boosts Efficiency of Quantum Dot Sensitized Solar Cells to over 9%
Ren, Zhenwei; Wang, Jin; Pan, Zhenxiao; Zhao, Ke; Zhang, Hua; Li, Yan; Zhao, Yixin; Mora-Sero, Ivan; Bisquert, Juan; Zhong, Xinhua American Chemical Society (2015)Charge recombination at an electrode/electrolyte interface is the main factor to limit the power conversion efficiency (PCE) of quantum dot sensitized solar cells (QDSCs). Herein, we present a novel and facile strategy ... -
Analysis of the Influence of Selective Contact Heterojunctions on the Performance of Perovskite Solar Cells
García-Rosell, Manuel; Bou, Agustín; Jiménez Tejada, Juan Antonio; Bisquert, Juan; Lopez-Varo, Pilar ACS (2018-03)Knowledge of the mechanisms that take place at the selective contacts, located at the charge-transport-layer (CTL)/perovskite heterojunctions, is crucial for the optimization of perovskite solar cells. Anomalous high ... -
Assessing possibilities and limits for solar cells
Nayak, Pabitra K.; Bisquert, Juan; Cahen, David Wiley (2011-05-05)What are the solar cell efficiencies that we can strive towards? We show here that several simple criteria, based on cell and module performance data, serve to evaluate and compare all types of today's solar cells. Analyzing ... -
Assessing the Drawbacks and Benefits of Ion Migration in Lead Halide Perovskites
Sakhatskyi, Kostiantyn; John, Rohit Abraham; Guerrero, Antonio; Tsarev, Sergey; Sabisch, Sebastian; Das, Tisita; Matt, Gebhard J.; Yakunin, Sergii; Cherniukh, Ihor; Kotyrba, Martin; Berezovska, Yuliia; Bodnarchuk, Maryna; Chakraborty, Sudip; Bisquert, Juan; Kovalenko, Maksym V. American Chemical Society (2022-10-14)Since the inception of the unprecedented rise of halide perovskites for photovoltaic research, ion migration has shadowed this material class with undesirable hysteresis and degradation effects, limiting its practical ... -
Band Engineering in Core/Shell ZnTe/CdSe for Photovoltage and Efficiency Enhancement in Exciplex Quantum Dot Sensitized Solar Cells
Shuang, Jiao; Qing, Shen; Mora-Sero, Ivan; Jin, Wang; Zhenxiao, Pan; Ke, Zhao; Xinhua, Zhong; Bisquert, Juan ACS Publications (2015-01-06)Even though previously reported CdTe/CdSe type-II core/shell QD sensitizers possess intrinsic superior optoelectronic properties (such as wide absorption range, fast charge separation, and slow charge recombination) in ... -
Band unpinning and photovoltaic model for P3HT:PCBM organic bulk heterojunctions under illumination
Bisquert, Juan; Garcia-Belmonte, Germà; Munar, Antoni; Sessolo, Michele; Soriano, Alejandra; Bolink, Henk J. Elsevier (2008)Capacitance analysis of P3HT:PCBM bulk heterojunction solar cells, in dark and under illumination, shows a linear Mott-Schottky characteristic at moderate reverse bias, indicating p-doping of the organic blend. The flatband ... -
Beyond Impedance Spectroscopy of Perovskite Solar Cells: Insights from the Spectral Correlation of the Electrooptical Frequency Techniques
Bou, Agustín; Pockett, Adam; Raptis, Dimitrios; Watson, Trystan; Carnie, Matt; Bisquert, Juan American Chemical Society (2020-09-21)Small perturbation techniques have proven to be useful tools for the investigation of perovskite solar cells. A correct interpretation of the spectra given by impedance spectroscopy (IS), intensity-modulated photocurrent ... -
Beyond the quasistatic approximation: Impedance and capacitance of an exponential distribution of traps
Bisquert, Juan American Physical Society (2008)Electronic carriers in disordered organic and inorganic semiconductor materials, used in electronic, optoelectronic, and photovoltaic devices, are usually affected by an exponential distribution of localized states in the ... -
Boosting Power Conversion Efficiencies of Quantum-Dot-Sensitized Solar Cells Beyond 8% by Recombination Control
Zhao, Ke; Pan, Zhenxiao; Mora-Sero, Ivan; Cánovas, Enrique; Wang, Hai; Song, Ya; Gong, Xueqing; Wang, Jin; Bonn, Mischa; Bisquert, Juan; Zhong, Xinhua American Chemical Society (2015)At present, quantum-dot-sensitized solar cells (QDSCs) still exhibit moderate power conversion efficiency (with record efficiency of 6–7%), limited primarily by charge recombination. Therefore, suppressing recombination ... -
Calculation of the Energy Band Diagram of a Photoelectrochemical Water Splitting Cell
Cendula, Peter; Tilley, S. David; Gimenez, Sixto; Bisquert, Juan; Schmid, Matthias; Grätzel, Michael; Schumacher, Jürgen O. American Chemical Society (2014-11)A physical model is presented for the semiconductor electrode of a photoelectrochemical cell. The model accounts for the potential drop in the Helmholtz layer and thus enables description of both band edge pinning and ...