Optimization of rotation speed for CuSCN hole transport layer in perovskite solar cell using spin coating

Sulistianto, Junivan; Purnamaningsih, Retno Wigajatri; Poespawati, Nji Raden

doi:10.1088/1742-6596/1195/1/012025

Cited by 8 publications

(1 citation statement)

References 19 publications

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“…Compared with synthetic organic hole-transport materials (HTM), cuprous thiocyanate (CuSCN) is regarded as a cheap but effective inorganic HTM for the fabrication of perovskite solar cells (PSCs), owing to abundant copper reserves on the earth, − high charge mobility, excellent energy level alignment, and satisfactory chemical stability. − So far, CuSCN-based PSCs have attained a certified champion power conversion efficiency (PCE) of 20.4% . Furthermore, compared to organic HTMs, CuSCN is found to protect perovskite layers from oxygen and moisture attack. − All of these advantages promise a bright prospect for CuSCN-based perovskite solar cells. − However, CuSCN has limited application in solution-processed PSCs due to its poor solubility. − The solvents for dissolving CuSCN are only a few short-chain n -alkyl sulfides and diethyl sulfides (DES), but they are likely to destroy perovskite layers simultaneously. − This results in an Ohmic contact degradation between the perovskite and CuSCN layers, which further weakens the power conversion efficiency of PSCs. − …”

Section: Introductionmentioning

confidence: 99%

Efficient and Stable CuSCN-based Perovskite Solar Cells Achieved by Interfacial Engineering with Amidinothiourea

Tang,

Yao,

et al. 2024

ACS Appl. Mater. Interfaces

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Cuprous thiocyanate (CuSCN) emerges as a prime candidate among inorganic hole-transport materials, particularly suitable for the fabrication of perovskite solar cells. Nonetheless, there is an Ohmic contact degradation between the perovskite and CuSCN layers. This is induced by polar solvents and undesired purities, which reduce device efficiency and operational stability. In this work, we introduce amidinothiourea (ASU) as an intermediate layer between perovskites and CuSCN to overcome the above obstacles. The characterization results confirm that ASU-modified perovskites have eliminated trap-induced defects by strong chemical bonding between − NH− and C�S from ASU and under-coordinated ions in perovskites. The interfacial engineering based on the ASU also reduces the potential barrier between the perovskite and CuSCN layers. The ASU-treated perovskite solar cells (PSC) with a gold electrode obtains an improved power conversion efficiency (PCE) from 16.36 to 18.03%. Furthermore, after being stored for 1800 h in ambient air (relative humidity (RH) = 45%), the related device without encapsulation maintains over 90% of its initial efficiency. The further combination of ASU and carbon-tape electrodes demonstrates its potential to fabricate low-cost but stable carbon-based PSCs. This work finds a universal approach for the fabrication of efficient and stable PSCs with different device structures.

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