The impact of spiro-OMeTAD photodoping on the reversible light-induced transients of perovskite solar cells

Tan, Boer; Raga, Sonia R.; Rietwyk, Kevin J.; Lu, Jianfeng; Fürer, Sebastian O.; Griffith, James C.; Cheng, Yi‐Bing; Bach, Udo

doi:10.1016/j.nanoen.2020.105658

Cited by 31 publications

(54 citation statements)

References 63 publications

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“…On the other hand, the accumulation capacitance at the LF region can be up to 1000 orders of magnitude larger than the high-frequency geometric capacitance (C2) of the perovskite layer. This is because the accumulated ions near interfaces only respond to AC signals at low frequencies, and thus originating the apparent excess capacitance at LF [50].…”

Section: Resultsmentioning

confidence: 99%

“…This is because the accumulated ions near interfaces only respond to AC signals at low frequencies, and thus originating the apparent excess capacitance at LF. [50] R 2 , R 3 are the recombination resistances, in which R 3 originates from the recombinations occurring at or near the interfaces. In particular, a mixed ionic-electronic nature of CsFAMA perovskite induces the movement of ions due to perturbation of the voltage, introducing defects that can be behaved as recombination centers, and consequently the hindered charge transfer dynamics.…”

Section: Wwwadvmatinterfacesdementioning

confidence: 99%

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An Approach to Quantify the Negative Capacitance Features in a Triple‐Cation based Perovskite Solar Cells

Dhifaoui

Hemasiri

Aloui

et al. 2021

Adv Materials Inter

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Understanding the device kinetics occurring in the bulk and charge selective layers is vital for optimizing the performance of perovskite solar cells (PSCs) and their development. We studied planar PSCs with and without hole transport layer (HTL) and measured hysteresis free power conversion efficiency of 16.23% with poly(3-hexylthiophene) [P3HT] as HTL, while the PSCs without HTL showed significant hysteresis. We investigated a comprehensive electrical response of the PSCs. The bias-dependent electrochemical impedance spectroscopy (EIS) revealed the appearance of the negative capacitance in the low-frequency regime. The modification of the low-frequency PSCs response accompanied by a further decrease in recombination resistance is due to the interfacial interactions between the migrating ions and the metal contact. The doped and undoped P3HT layers impeded this interaction which explains the absence of the negative capacitance at lower applied voltages. Our investigation provides an understanding of the physical processes behind the negative capacitance.

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Section: Resultsmentioning

confidence: 99%

Section: Wwwadvmatinterfacesdementioning

confidence: 99%

An Approach to Quantify the Negative Capacitance Features in a Triple‐Cation based Perovskite Solar Cells

Dhifaoui

Hemasiri

Aloui

et al. 2021

Adv Materials Inter

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show abstract

“…Light soaking promotes ion and defect migration in PSCs [ 173 , 174 ] as well as phase segregation [ 175 , 176 ] in the mixed perovskite layer, which decreases efficiency. Additionally, light can induce or accelerate harmful chemical reactions at the interfaces, which lead to detrimental changes in organic charge extraction layers, material intermixing at the interfaces and ion exchange between adjacent layers [ 177 , 178 ]. Sekimoto et al.…”

Section: Stabilitymentioning

confidence: 99%

Printing strategies for scaling-up perovskite solar cells

Wang

Duan

et al. 2021

National Science Review

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Photovoltaic technology offers a sustainable solution to the problem of soaring global energy demands. Recently, metal halide perovskite solar cells (PSCs) have attracted worldwide interest because of their high power conversion efficiency of 25.5% and great potential in becoming a disruptive technology in the photovoltaic industry. The transition from research to commercialization requires advancements of scalable deposition methods for both perovskite and charge transporting thin films. Herein, we share our view regarding the current challenges to fabrication of PSCs by printing techniques. We focus particularly on ink technologies, and summarize the strategies for printing uniform, pinhole-free perovskite films with good crystallinity. Moreover, the stability of perovskite solar modules is discussed and analyzed. We believe this review will be advantageous in the area of printable electronic devices.

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“…As a commonly used HTL for PSCs, Spiro-OMeTAD has also shown excellent bifunctional characteristics in previous devices. [32,33] We used Spiro-OMeTAD in place of the frequently used TFB in PeLED. We measured the work functions (WF) of Spiro-OMeTAD by Kelvin probe force microscopy (KPFM).…”

Section: Interface Engineeringmentioning

confidence: 99%

Reciprocally Photovoltaic Light‐Emitting Diode Based on Dispersive Perovskite Nanocrystal

Duan

Wen

et al. 2022

Small

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Integrating highly efficient photovoltaic (PV) function into light‐emitting diodes (LEDs) for multifunctional display is of great significance for compact low‐power electronics, but it remains challenging. Herein, it is demonstrated that solution engineered perovskite nanocrystals (PNCs, ≈100 nm) enable efficient electroluminescence (EL) and PV performance within a single device through tailoring the dispersity and interface. It delivers the maximum brightness of 490 W sr−1 m−2 at 2.7 V and 23.2% EL external quantum efficiency, a record value for near‐infrared perovskite LED, as well as 15.23% PV efficiency, among the highest value for nanocrystal perovskite solar cells. The PV–EL performance is well in line with the reciprocity relation. These all‐solution‐processed PV‐LED devices open up viable routes to a variety of advanced applications, from touchless interactive screens to energy harvesting displays and data communication.

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The impact of spiro-OMeTAD photodoping on the reversible light-induced transients of perovskite solar cells

Cited by 31 publications

References 63 publications

An Approach to Quantify the Negative Capacitance Features in a Triple‐Cation based Perovskite Solar Cells

An Approach to Quantify the Negative Capacitance Features in a Triple‐Cation based Perovskite Solar Cells

Printing strategies for scaling-up perovskite solar cells

Reciprocally Photovoltaic Light‐Emitting Diode Based on Dispersive Perovskite Nanocrystal

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