Acid dissociation constant-guided defect passivation for efficient carbon-based planar n-i-p perovskite solar cells

Sukhanidhan Singh

doi:10.1016/j.apsusc.2026.168026

Acid dissociation constant-guided defect passivation for efficient carbon-based planar n-i-p perovskite solar cells

2026-08-08

0

PRE

AI

S

Sukhanidhan Singh

C

Chukwuebuka Emmanuel Usulor

I

Isaac Chinaza Ogbuagu

W

Woraprom Passatorntaschakorn

W

Warunee Khampa

A

Athipong Ngamjarojana

H

Hideki Nakajima

P

Pisist Kumnorkaew

A

Anusit Kaewprajak

K

Komsun Lapawae

K

Kitiphat Sinthiptharakoon

N

Nuttaya Sukgorn

P

Pipat Ruankham

D

Duangmanee Wongratanaphisan *

DOI：10.1016/j.apsusc.2026.168026

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Abstract

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• pKa-guided design passivates defects in carbon-based CsFA perovskite solar cells. • High-pKa hydantoin offers dual passivation via C=O ⋯ Pb2+ and N–H ⋯ I. • Efficiency enhanced to 14.20% (1 sun) and 30.33% (indoor, 1000 lx). • Scalable cells achieve 10.36% (1 cm2, 1 sun) and 29.38% (indoor). • Better interfacial energetics and defect suppression give 87% stability retention.

Keywords:

Carbon-based perovskite solar cells

pKa-guided interfacial engineering

Lewis-base coordination

Ion migration suppression

Acid dissociation constant-guided defect passivation for efficient carbon-based planar n-i-p perovskite solar cells

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