Formamidinium Incorporation into Compact Lead Iodide for Low Band Gap Perovskite Solar Cells with Open-Circuit Voltage Approaching the Radiative Limit

Zhang, Hui; Kramarenko, Mariia; Martínez‐Denegri, Guillermo; Osmond, Johann; Toudert, Johann; Martorell, Jordi

doi:10.1021/acsami.8b20899

Cited by 11 publications

(14 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The presence of excess PbI 2 at both interfaces in solar cells with a high QY, low PCE, and high δ V is confirmed by scanning electron microscopy (Figure S7, Supporting Information). In the corresponding microscope image, the bright regions stand for PbI 2 , as shown previously in other publications …”

Section: Energy Barriers Causing a Deviation From The Ideal Diode Behsupporting

confidence: 77%

“…As mentioned in Section 2.1, such different values are not caused by deliberately different fabrication parameters but by a limited reproducibility, impacting in particular the electronic properties of the perovskite layer. Despite reaching rather high values compared with the literature, [13] the measured V oc s lag significantly below the V oc,rad of 1.28 V calculated from Equation (2) using the structure and layer thicknesses taken from Figure 1a. This can be attributed in part to the low QY, which remains much below 100%.…”

Section: Measured Qy and V Oc And Full-wavevector Generalized Detailecontrasting

confidence: 60%

“…A series of solar cells based on a FA 0.8 MA 0.2 PbI 3Ày Br y perovskite were produced with the two-step method. [13,[20][21][22] The fabrication recipe is described in Supporting Information S2. The PSCs present an n-i-p configuration with the structure shown in Figure 1a: glass/ITO/SnO 2 /perovskite/Spiro-OMeTAD/Au.…”

Section: Solar Cell Structure and Optical Propertiesmentioning

confidence: 99%

“…In the corresponding microscope image, the bright regions stand for PbI 2 , as shown previously in other publications. [13,34,52]…”

Section: Energy Barriers Causing a Deviation From The Ideal Diode Behmentioning

confidence: 99%

“…However, the V oc of current PSCs lags on average significantly below the expected V oc,rad . [13,14] Finding the origin of this behavior is needed to produce optimal devices. This requires measuring both the QY and V oc of complete PSCs and analyzing the obtained data with suitable theoretical models to determine the nature of the nonidealities lowering V oc .…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Relation between Fluorescence Quantum Yield and Open‐Circuit Voltage in Complete Perovskite Solar Cells

et al. 2020

Self Cite

View full text Add to dashboard Cite

Bringing the Voc of a perovskite solar cell toward its radiative value, corresponding to a 100% external fluorescence quantum yield (QY) of the cell, has been pursued to reach the highest performance photovoltaic devices. Therefore, much research has been focused on maximizing the QY of the active layer isolated from the rest of the cell layers. However, such quantity does not often correlate with the Voc following the ideal diode relation. Herein, the QYs of complete FA0.8MA0.2PbI3−yBry solar cells are reported, ranging from 0.1% to 3%, and compared with their Vocs, ranging from 1 to 1.13 V. By combining these measurements with electromagnetic simulations based on a full‐wavevector detailed balance and a fluorescence power‐loss model, it is demonstrated that a nonoptimal Voc in mixed‐cation lead halide perovskite cells is not only due to nonradiative photocarrier recombination at traps. In addition to the expected parasitic absorption of the emitted photons in the electrode layers, discrepancies appear between Voc and QY. These discrepancies are attributed to the rise of energy barriers, a side effect of trap removal. Indeed, although surface passivation may enhance the QY, its beneficial effect may be counterbalanced by the emergence of such barriers between active and charge‐transporting layers.

show abstract

Section: Energy Barriers Causing a Deviation From The Ideal Diode Behsupporting

confidence: 77%

Section: Measured Qy and V Oc And Full-wavevector Generalized Detailecontrasting

confidence: 60%

Section: Solar Cell Structure and Optical Propertiesmentioning

confidence: 99%

“…In the corresponding microscope image, the bright regions stand for PbI 2 , as shown previously in other publications. [13,34,52]…”

Section: Energy Barriers Causing a Deviation From The Ideal Diode Behmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Relation between Fluorescence Quantum Yield and Open‐Circuit Voltage in Complete Perovskite Solar Cells

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

Light Recycling Using Perovskite Solar Cells in a Half‐Cylinder Photonic Plate for an Energy Efficient Broadband Polarized Light Emission

Ferreira

Martínez‐Denegri

Kramarenko

et al. 2021

Advanced Photonics Research

Self Cite

View full text Add to dashboard Cite

Energy efficiency in many illumination devices is far from optimal. For instance, in liquid crystal displays, a large fraction of the emitted light is lost provided absorbing polarizers are used for the image formation. Herein, a light‐guiding structure to achieve diffuse polarized light emission from the top of the guide, combined with light harvesting and conversion back into electricity of the light with the unwanted polarization is proposed. Key in achieving such a double goal is the use of a half‐cylinder photonic plate for an ergodic light‐guided propagation incorporating a nonabsorbing reflective multilayer light polarizer and perovskite (PVK) solar cells. In the complex combination of micro‐ and nanometric dimensions of the proposed structure, light propagation was resolved using ray optics tracing interlaced with a full wave vector inverse integration approach. A broadband polarization extinction ratio of 0.1 for the light diffused from the top surface is demonstrated, while close to 90% of the s‐polarized light remains trapped and can be recycled back to electricity by the PVK solar cells placed on the front and back ends of the guide. PVK cells are shown to be optimal in such conversion with an overall efficiency ranging from 38 to 52%.

show abstract

Degradation Mechanism of Phenethylamine‐Based Interlayers in Perovskite Solar Cells and Breakthrough

et al. 2023

View full text Add to dashboard Cite

Organic-inorganic hybrid perovskite solar cells (PSCs) have demonstrated significant development by attaining 25% power conversion efficiencies (PCEs), competing with silicon-based solar cells. [1][2][3][4] The outstanding performance primarily results from the intrinsic superiority of the optoelectronic properties of 3D structures comprising the ABX 3 structure. Early-stage perovskite (PVK) studies have focused on high-quality PVK layers due to inhomogeneous and nonuniform PVK films fabricated using a solution process. [5] A variety of methodologies, such as additive engineering, twostep spin-coating, and anti-solvent methods, have been suggested, some of which result in extremely uniform PVK films without defects. [6][7][8][9] The high quality of these PVK films is mainly attributed to optimized light management, which results in an increase in the short-circuit current density ( J SC ) owing to enhanced light absorption. Fueled by these accomplishments, the photocurrents generated in PSCs have almost approached the Shockley-Queisser limits. [10][11][12] To achieve further enhancement in performance, research has shifted from light management to carrier management to increase the PCEs of PSCs. [13][14][15] The highest efficiency reported recently was realized by a defect-less high-quality electron transport layer (ETL) in PSCs, which led to a high open-circuit voltage (V OC ) while maintaining superior light absorption. [16] Additionally, most leading PSCs have adopted passivation layers at the PVK/hole transport layer (HTL) interface. [17][18][19][20][21] These techniques focus on layers adjacent to the PVKs, and are categorized into carrier management engineering. [22][23][24] Recently, materials that easily form 2D PVKs, such as phenethylamine halides (PEAX), have drawn attention as alternatives to the preexisting passivation layers. [25][26][27] The common phenomenon reported by the incorporation of these layers on top of PVKs is high V OC and fill factor (FF), in addition to relatively high air and electrical stability. [28,29] The strong interaction of the passivation layers with the PVKs has received the most focus in current studies. [30] As the term passivation layers literally mean protection, improvement in the stability of PSCs is often accompanied by the introduction of PEAX. [31] However, the stability issues associated with PEAX were often observed in our experiments, showing that the PCEs of PSCs were easily degraded by aging or heat when PEAX was inserted at the PVK/2,2 0 ,7,7 0 -tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9 0 -spirobifluorene (Spiro-OMeTAD) interface, although the initial performance of PSCs with PEAX was high. Jiang et al., who reported the efficacy of PEAI (I: iodide) in PSCs for the first time, also observed an abrupt decrease in PCE when the samples were thermally treated, in accordance with our results. [32] The adverse effects of PEAX were also pronounced in the inverted structures. [26,27,33] The exact mechanism underlying the degradation associated with PEAX has not been ...

show abstract

Formamidinium Incorporation into Compact Lead Iodide for Low Band Gap Perovskite Solar Cells with Open-Circuit Voltage Approaching the Radiative Limit

Cited by 11 publications

References 55 publications

Relation between Fluorescence Quantum Yield and Open‐Circuit Voltage in Complete Perovskite Solar Cells

Relation between Fluorescence Quantum Yield and Open‐Circuit Voltage in Complete Perovskite Solar Cells

Light Recycling Using Perovskite Solar Cells in a Half‐Cylinder Photonic Plate for an Energy Efficient Broadband Polarized Light Emission

Degradation Mechanism of Phenethylamine‐Based Interlayers in Perovskite Solar Cells and Breakthrough

Contact Info

Product

Resources

About