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N-25 — Electron Transport Material

An organic small molecule that replaces PCBM as the electron transport layer.

Role
ETM
Material type
Small Molecule
Solvent system
Aromatic
LUMO / HOMO
−3.84 / −5.98
Device architecture
p-i-n
Power conversion efficiency
25.1%

0.1 cm² cell

ETM · Small Molecule

N-25

N-25 is an organic small molecule designed to replace the conventional fullerene derivative PCBM as the electron transport layer in p-i-n perovskite solar cells. It is processed from aromatic solvent systems and, in the stack shown here, is capped by BCP beneath the silver electrode.

Measured performance vs PCBM (PCE 25.9%), 0.1 cm² cell

Vₒᴄ
1.175V
Jₛᴄ
25.8mA/cm²
FF
83.0%
PCE
25.1%

Typical device architecture

GlassITOSAMPVSKPassivationN-25BCPAg
Layer stack of a N-25 device showing glass, ITO, transport layers, perovskite absorber, passivation and electrode.
Device data

Measured performance of N-25

Data measured on 0.1 cm² cells in our partner laboratories.

Energy level alignment for N-25.
Energy level alignmentValence and conduction band positions of the perovskite absorber against the transport material.
Current density – voltage for N-25.
Current density – voltageLight J–V characteristics measured on a 0.1 cm² cell, against the stated reference material.

Processing notes

  • N-25 is deposited where PCBM would normally sit, immediately below the BCP buffer layer and the silver electrode.
  • No dopant is required.

Evaluate N-25 in your own devices

We supply evaluation quantities together with a specification sheet so your team can qualify the material under your own conditions.