Br-2PACz TCI B6391

Chemical Identity

Other names: Br-2PACz · [2-(3,6-Dibromo-9H-carbazol-9-yl)ethyl]phosphonic Acid
CAS No.: 2762888-11-7
PubChem: CID 170305233
Formula: C14H12Br2NO3P
Molecular weight: 433.04 g/mol
Purity: >99.0%(HPLC)(T)

Full identifiers (IUPAC, SMILES, InChIKey)

IUPAC: 2-(3,6-dibromocarbazol-9-yl)ethylphosphonic acid
SMILES: C1=CC2=C(C=C1Br)C3=C(N2CCP(=O)(O)O)C=CC(=C3)Br
InChIKey: WSKHKHPOXQBLPZ-UHFFFAOYSA-N

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Berat 500mg

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Br-2PACz is a carbazole-based self-assembled monolayer (SAM) material carrying a phosphonic acid group at the end of its ethyl chain and a bromine atom on the carbazole backbone. In materials science laboratories, this compound is used to form a molecular layer just one molecule thick on the surface of transparent conductive oxides, which then functions as the hole-transporting layer in inverted-structure perovskite solar cells. This monolayer approach replaces conventional hole-transporting layers that are far thicker and consume considerably more material per device.

The property that makes this material attractive is the ability of the phosphonic acid group to bind strongly and spontaneously to metal oxide surfaces such as indium tin oxide, forming an ordered layer through nothing more than immersion or spin coating from an alcohol solution. The bromine substituent on the carbazole ring shifts the energy levels and the surface dipole moment, so that energy band alignment with the perovskite layer can be tuned — something that translates directly into the open-circuit voltage of the finished device. Because the layer is only one molecule thick, the series resistance it introduces is very small and parasitic light absorption is negligible.

In Indonesian laboratories, Br-2PACz is typically handled within university and national research group programmes working on perovskite photovoltaics, where it is dissolved in alcohol solvents and applied to patterned oxide substrates under controlled conditions. It generally sits alongside other perovskite precursors and charge transport materials on the same project bench, and is used in small quantities per experiment, which makes careful stock handling and consistent solution preparation an important part of the workflow.

TCI brochures (PDF)

Hole-selective SAM Forming Agent Contributing to Improved Performance of OPVs Cl-2PACz 2024-01-26 · p. 1
For Highly Efficient Solar Cells, Hole-Selective, Self-Assembled Monolayer (SAM)-Forming Agents 2024-09-02 · p. 1
n-Type SAM Forming Agent Enabling Efficient Perovskite Solar Cell PANDI 2026-09-10 · p. 2
SAM Forming Agent Enabling a Superwetting Layer for Uniform Perovskite Formation: MPA-CPA 2026-07-07 · p. 2
SAM-Forming Agent for Efficient NBG-Type Perovskite Solar Cells: BrNH3-4PACz 2025-10-22 · p. 2
Carbazoles 2025-06-27 · p. 4

Related TCI products

Inverted perovskite solar cell fabrication — the phosphonic acid anchor forms the hole-transporting monolayer directly on transparent conductive oxide, replacing much thicker conventional hole transport layers.
Energy level alignment studies — the bromine substituent on the carbazole ring shifts energy levels and surface dipole, allowing researchers to tune band alignment against different perovskite compositions.
Open-circuit voltage optimisation — because band alignment with the perovskite layer is adjustable through this substituent, the material supports systematic device voltage improvement experiments.
Surface modification of metal oxide electrodes — spontaneous and strong binding to surfaces such as indium tin oxide allows ordered layer formation by simple immersion or spin coating.
Low-loss charge extraction layer research — the single-molecule thickness keeps series resistance very small and parasitic light absorption negligible, useful for loss-analysis studies.

From the TCI brochure

Ternary BHJ organic photovoltaics

Brand	TCI
CAS number	2762888-11-7
Molecular formula	—
Purity	—
Category	Materials Science > Electronic Materials > Perovskite Solar Cell (PSC) Materials
Pack sizes	available in research-scale packaging; please refer to the current catalogue listing for available sizes
Physical form	—
Storage	store according to the manufacturer's stated conditions on the product label

Product code: B6391

Data from the TCI brochure

PCE OPV ternary BHJ	18.4% (stabilized)

Source: TCI brochure FF092 (2024-09-02)

Store the material in its original tightly closed container, kept in a cool, dry and well-ventilated area away from direct sunlight, moisture and incompatible substances, and follow the storage conditions stated by the manufacturer on the product label. Since this compound is used to prepare alcohol-based solutions for thin-film deposition, containers should be resealed promptly after weighing to limit moisture uptake and contamination that could affect monolayer quality. Handle in a fume hood using appropriate personal protective equipment including safety glasses, gloves and a laboratory coat. Consult the manufacturer's Safety Data Sheet before use, and dispose of residues and contaminated materials in accordance with applicable laboratory chemical waste procedures.

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