Metal Counter Electrodes for Perovskite Solar Cells

Uhl, Alexander R.

doi:10.1002/9783527813636.ch17

Cited by 9 publications

(7 citation statements)

References 141 publications

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“…Despite the cost, it is well known from the literature that gold generally leads to the best-performance devices owing to its high work function (5.1 eV) and excellent chemical stability . In this work, a record high PCE of 17.5% was achieved under reverse scan (see Figure b), confirming the superiority of gold as a counter electrode material as well as the effectiveness of α-terpineol as a solvent additive (see Table ).…”

Section: Resultssupporting

confidence: 70%

Boosting the Performance of One-Step Solution-Processed Perovskite Solar Cells Using a Natural Monoterpene Alcohol as a Green Solvent Additive

Giuliano

Bonasera

Scopelliti

et al. 2021

ACS Appl. Electron. Mater.

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The perovskite film is the core of a perovskite solar cell (PSC), and its quality is crucial for the performance of such devices. The morphology, crystallinity, and surface coverage of the perovskite layer greatly affect the power conversion efficiency (PCE), hysteresis, and long-term stability of PSCs. The incorporation of appropriate solvent additives in the perovskite precursor solution is an effective strategy to control the film morphology and reduce the defects and grain boundaries. However, the commonly used solvent additives are environmentally harmful and highly toxic. In this work, α-terpineol (a nontoxic, eco-friendly, and low-cost monoterpene alcohol) is employed for the first time as an alternative green solvent additive to improve the quality of one-step solution-processed CH 3 NH 3 PbI 3−x Cl x films and to restrain nonradiative recombination in the corresponding devices. An in-depth investigation of the physicochemical effects induced by such a high-boiling-point, polar protic solvent when incorporated into a conventional perovskite solvent system is provided. The collected data demonstrate that the addition of a precise amount of α-terpineol can generate uniform and highly crystalline perovskite films with improved photovoltaic performances. Through this approach, the PCE of planar n−i−p PSCs is boosted up to 17.5% (against 16.1% of the top control device) with reduced hysteresis and enhanced ambient stability.

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Section: Resultssupporting

confidence: 70%

Boosting the Performance of One-Step Solution-Processed Perovskite Solar Cells Using a Natural Monoterpene Alcohol as a Green Solvent Additive

Giuliano

Bonasera

Scopelliti

et al. 2021

ACS Appl. Electron. Mater.

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“…Consequently, the nature of the formed contacts to the electrode will significantly influence the overall device performance. [ 70 ] Compared to other factors that cause perovskite solar cells instability, the reaction between electrode materials and the perovskites contributes most significant degradation. [ 71 ] For Ti‐based perovskite solar cells, gold (Au) is chosen as an optimal back contact metal with a work function of 5.1 eV.…”

Section: Performance Of Ti‐based Vacancy‐ordered‐dhps Solar Cell (Com...mentioning

confidence: 99%

Titanium‐Based Vacancy‐Ordered Double Halide Family in Perovskite Solar Cells

Aslam

Farooqi

Rahman

et al. 2022

Physica Status Solidi (a)

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The toxicity and stability risk of perovskite structured materials have raised concerns in respective to utilization as a solar energy conversion material. The most common perovskite structured material is lead (Pb)-based, which is an element that is knowingly toxic to humans and the environment. Although the stability issue has been well allayed with several optimizations, the ruinous Pb remains a future challenge for perovskite solar cells. Compositional and structural derivatives of the perovskite family, specifically vacancy-ordered double halide perovskites (DHPs), have attracted the attention of researchers in terms of efficiency and toxicity issues subjugation. Although tin (Sn)-based vacancyordered DHPs have been widely explored, the intrinsic property conduces low performance output. Titanium (Ti) is a potential substituting candidate of Sn in a vacancy-ordered DHPs structure. It is an environment-friendly element ideal for sustainable perovskite structured compositions. Rudimentary studies of Ti-based vacancy-ordered DHPs emphasized its potential development as an eco-friendly and stable solar cell. In promoting the development of Ti-based vacancy-ordered DHPs as potential absorbers, we summarized herein the recent progress of experimental and theoretical studies of this perovskite material.

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“…Further, the reflection and light-trapping properties of the electrode material should receive consideration for reducing absorber thickness and/or pushing the PCE to theoretical limits. [164] Finally, as they are used as the uppermost layer, which is the closest layer to the environment, they should be robust enough to slow down moisture penetration into the perovskite layer. [85] Figure 50.…”

Section: Electrode Contactsmentioning

confidence: 99%

“…Metal alloys allow for the tailoring of material properties such as the work function, chemical stability, toughness, or reflectivity. [ 164 ] Interestingly, Jiang et al fabricated Ag–Al alloy as CE of an inverted PSC and the device prepared exhibited better performance than pristine Ag electrode. [ 178 ] The enhancement in the PCE of cells with Ag–Al CE is attributed to the formation of AlO x , which can allow an effective electron extraction at the PCBM/Ag–Al interface.…”

Section: Electrode Contactsmentioning

confidence: 99%