Impact of the implementation of a mesoscopic TiO2 film from a low-temperature method on the performance and degradation of hybrid perovskite solar cells

Castro-Chong, Alejandra; Qiu, Weiming; Bastos, J.P.A.; Yimga, Nadine Tchamba; García-Rodríguez, Rodrigo; Idígoras, Jesús; Anta, Juan A.; Aernouts, Tom; Oskam, Gerko

doi:10.1016/j.solener.2020.03.041

Cited by 5 publications

(7 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The two arcs become of comparable size at all light intensities and the apparent ideality factor drops below 2, while still maintaining the consistency between steady‐state and impedance values (Figure S5). In this case the simulated spectra have more resemblance to the measured spectra, and is similar to those previously reported in the literature for mixed perovskites [47,51] . As pointed out before, the model, which assumes a planar device with constant dielectric constant, predicts a slight exponential dependence of the high frequency capacitance at high voltages (Figure S6) in agreement with the experiment.…”

Section: Resultssupporting

confidence: 89%

“…Using this methodology, two solutions are prepared: solution A consists of 1.25 M PbI 2 in a mixture of N, N‐dimethyl formamide and dimethyl sulfoxide (DMF/DMSO: 90/10, v/v) and solution B consists of CH(NH 2 ) 2 I (FAI), CH 3 NH 3 I (MAI) and CH 3 NH 3 Br (MABr) (71 : 19 : 10 molar ratio) in isopropanol. The solution chemistry and spin coating conditions were selected for proper infiltration of a 120‐nm‐thick mesoporous TiO 2 layer, according to Castro‐Chong et al [51] . Spiro‐OMeTAD (“spiro”) and Au were used as hole transport layer and electrode, respectively; following our previous report [51] …”

Section: Methodsmentioning

confidence: 99%

“…The solution chemistry and spin coating conditions were selected for proper infiltration of a 120‐nm‐thick mesoporous TiO 2 layer, according to Castro‐Chong et al [51] . Spiro‐OMeTAD (“spiro”) and Au were used as hole transport layer and electrode, respectively; following our previous report [51] …”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Illumination Intensity Dependence of the Recombination Mechanism in Mixed Perovskite Solar Cells

et al. 2021

Self Cite

View full text Add to dashboard Cite

Recombination mechanisms in solar cells are frequently assessed through the determination of ideality factors. In this work we report an abrupt change of the value of the “apparent” ideality factor (nAP) in high‐efficiency FA0.71MA0.29PbI2.9Br0.1 based mesoscopic perovskite solar cells as a function of light intensity. This change is manifested as a transition from a regime characterized by nAP∼1.8–2.5 at low light intensities (<10 mWcm‐2) to one characterized by nAP∼1. This transition is equally observed in the recombination resistance extracted from open‐circuit impedance measurements. We use drift‐diffusion simulations with explicit consideration of ion migration to determine the origin of this transition. We find that a change ofrecombination mechanism concurrent with a modification of the concentration of ionic vacancies is the most likely explanation of the observed behaviour. In the drift‐diffusion simulations we show that the apparent ideality factor is in fact affected by the ion vacancy concentration so it is not the optimal parameter to assess the dominant recombination mechanism. We argue that a procedure based on a recently derived “electronic” ideality factor obtained from the high frequency feature of the impedance spectrum is better suited to determine the recombination route that dictates the photovoltage.

show abstract

Section: Resultssupporting

confidence: 89%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Illumination Intensity Dependence of the Recombination Mechanism in Mixed Perovskite Solar Cells

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Readers interested in the role of the m-TiO 2 layer in the key photoelectric conversion processes of PSCs are directed to our previous work. 11 Notably, it was proposed in several recently published works that the m-TiO 2 layer dramatically influences the ion migration and ion accumulation behavior of PSCs, [12][13][14] an important factor related to the device stability. The device stability has become a bottleneck issue that restricts the further improvement of PSCs from both the academic and practical aspects.…”

mentioning

confidence: 99%

Mesoporous TiO₂ layer suppresses ion accumulation in perovskite solar cells

Miao

Yuan

Zhu

et al. 2022

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

“…In order to rule out system size effects, and to get closer to the macroscospic limit, we have extended the simulations to a 6 × 6 × 20 supercell (∼8600 atoms) and a total simulation time of 40 ns. These longer simulations were run on a composition of MA 0.29 FA 0.71 PbBr 0.1 I 2.9 [49] and with 4.25% empty halide sites (see Fig. 10).…”

Section: Dynamical Propertiesmentioning

confidence: 99%

Transferable classical force field for pure and mixed metal halide perovskites parameterized from first principles

Seijas-Bellido,

Samanta,

Valadez-Villalobos

et al. 2021

Preprint

View full text Add to dashboard Cite

Many key features in photovoltaic perovskites occur in relatively long time scales and involve mixed compositions. This requires realistic but also numerically simple models. In this work we present a transferable classical force field to describe the mixed hybrid perovskite MAxFA1−xPb(BryI1−y)3 for variable composition (∀x, y ∈ [0, 1]). The model includes Lennard-Jones and Buckingham potentials to describe the interactions between the atoms of the inorganic lattice and the organic molecule, and the AMBER model to describe intramolecular atomic interactions. Most of the parameters of the force field have been obtained by means of a genetic algorithm previously developed to parameterize the CsPb(BrxI1−x)3 perovskite [1]. The algorithm finds the best parameter set that simultaneously fits the DFT energies obtained for several crystalline structures with moderate degrees of distortion with respect to the equilibrium configuration. The resulting model reproduces correctly the XRD patterns, the expansion of the lattice upon I/Br substitution and the thermal expansion coefficients. We use the model to run classical molecular dynamics simulations with up to 8600 atoms and simulation times of up to 40 ns. From the simulations we have extracted the ion diffusion coefficient of the pure and mixed perovskites, presenting for the first time these values obtained by a fully dynamical method using a transferable model fitted to first principles calculations. The values here reported can be considered as the theoretical upper limit for ion migration dynamics induced by halide vacancies in photovoltaic perovskite devices under operational conditions.

show abstract

Impact of the implementation of a mesoscopic TiO2 film from a low-temperature method on the performance and degradation of hybrid perovskite solar cells

Cited by 5 publications

References 54 publications

Illumination Intensity Dependence of the Recombination Mechanism in Mixed Perovskite Solar Cells

Illumination Intensity Dependence of the Recombination Mechanism in Mixed Perovskite Solar Cells

Mesoporous TiO₂ layer suppresses ion accumulation in perovskite solar cells

Transferable classical force field for pure and mixed metal halide perovskites parameterized from first principles

Contact Info

Product

Resources

About

Impact of the implementation of a mesoscopic TiO2 film from a low-temperature method on the performance and degradation of hybrid perovskite solar cells

Cited by 5 publications

References 54 publications

Illumination Intensity Dependence of the Recombination Mechanism in Mixed Perovskite Solar Cells

Illumination Intensity Dependence of the Recombination Mechanism in Mixed Perovskite Solar Cells

Mesoporous TiO2 layer suppresses ion accumulation in perovskite solar cells

Transferable classical force field for pure and mixed metal halide perovskites parameterized from first principles

Contact Info

Product

Resources

About

Mesoporous TiO₂ layer suppresses ion accumulation in perovskite solar cells