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Product Code M2427A1-500mg
Price $238 ex. VAT

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Small Self-Assembled Monolayer Molecule for High Efficiency Solar Cells

Hole transport or extraction layer for NFA-polymer solar cells and p-i-n perovskite solar cells


MeO-2PACz, namely (2-(3,6-Dimethoxy-9H-carbazol-9-yl)ethyl)phosphonic acid, a small molecule with a structure consisting of electron rich 3,6-methoxylcarbzole unit joined by an anchoring functional group of ethyl phosphonic acid at 9-position of the carbazole ring. It is a family member of 2PACz which is a self-assembled monolayer (SAM) material acting as interface between indium tin oxide (ITO), or other metal oxides, and the photoactive layer in perovskite or polymer solar cells.

When an intermediate layer of nickel oxide (NiO) between ITO and MeO-2PACz is added, the surface coverage and homogeneity of the SAM improves. The presence of NiO leads to a homogeneous distribution of MeO-2PACz molecules on the metal oxide area, accompanied by a higher shunt resistance in the device, when compared to devices with SAM directly processed on ITO.

Being the optimal substrate for stabilizing black-phase FAPbI3, MeO-2PACz employed in inverted-structured perovskite solar cells (PSCs) shows the best photovoltaic performance. With an impressive PCE of 22.13%, this is the highest efficiency of FAPbI3 based on inverted-structured PSCs. Furthermore, the best device exhibits free hysteresis and excellent long-term stability, maintaining 92% of the initial PCEs after 800 h aging under ambient conditions [1].

General Information

CAS Number 2377770-18-6
Chemical Formula C16H18NO5P
Molecular Weight 335.29 g/mol
Absorption* λmax 465 nm (ITO)
Fluorescence λem (n.a.)
HOMO/LUMO HOMO = 5.30 eV, LUMO = 2.12 eV
Synonyms (2-(3,6-Dimethoxy-9H-carbazol-9-yl)ethyl)phosphonic acid
Classification or Family Carbazole derivatives, Self-assembly Monolayers, Hole transport layer, Hole extraction layer, p-i-n Perovskite solar cells, Organic photovoltaics

Product Details

Purity > 99% (HPLC)
Melting Point Tm = 171 °C
Appearance Off-white powder/crystals

Chemical Structure

meo-2pacz - 2377770-18-6 - (2-(3,6-dimethoxy-9H-carbazol-9-yl)ethyl)phosphonic acid chemical structure
MeO-2PACz - (2-(3,6-dimethoxy-9H-carbazol-9-yl)ethyl)phosphonic acid chemical structure, 2377770-18-6

MSDS Documentation

meo-2pacz - 2377770-18-6 - (2-(3,6-dimethoxy-9H-carbazol-9-yl)ethyl)phosphonic acidMeO-2PACz MSDS Sheet

Literature and Reviews

  1. Stable α-FAPbI3 in Inverted Perovskite Solar Cells with Efficiency Exceeding 22% via a Self-Passivation Strategy, D. Zhang et al., Adv. Funct. Mater., 32 (27), 2200174 (2022); DOI: 10.1002/adfm.202200174.
  2. 18.4 % Organic Solar Cells Using a High Ionization Energy Self-Assembled Monolayer as Hole-Extraction Interlayer, Y. Lin et al., ChemSusChem, 14 (17), 3569-3578 (2021); DOi: 10.1002/cssc.202100707.
  3. NiOx-Seeded Self-Assembled Monolayers as Highly Hole-Selective Passivating Contacts for Efficient Inverted Perovskite Solar Cells, J. Sun et al., Solar RRL, 5 (11), 2100663 (2021); DOI: 10.1002/solr.202100663.
  4. Conformal monolayer contacts with lossless interfaces for perovskite single junction and monolithic tandem solar cells, A. Al-Ashouri et al., Energy Environ. Sci., 12, 3356-3369 (2019); DOI: 10.1039/C9EE02268F.
  5. Operational stability, low light performance, and long-lived transients in mixed-halide perovskite solar cells with a monolayer-based hole extraction layer, R. Murdey et al., Sol. Energy Mater. Sol. Cells., 245, 111885 (2022); DOI: 10.1016/j.solmat.2022.111885.
  6. Enhanced Self-Assembled Monolayer Surface Coverage by ALD NiO in p‑i‑n Perovskite Solar Cells, N. Phung et al., ACS Appl. Mater. Interfaces, 14 (1), 2166–2176 (2022); DOI: 10.1021/acsami.1c15860.

To the best of our knowledge the information provided here is accurate. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only.

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