Improved photovoltaic performance and stability of perovskite solar cells by adoption of an n-type zwitterionic cathode interlayer

Noh, Young Wook; Ha, Jung Min; Son, Jung Geon; Han, Jongmin; Lee, Heunjeong; Kim, Dae Woo; Jee, Min Hun; Shin, Woo Gyeong; Cho, Shinuk; Kim, Jin Young; Song, Myoung Hoon; Woo, Han Young

doi:10.1039/d4mh00253a

Cited by 1 publication

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“…In contrast, the PCE of the devices employing 2PACz (i.e., 2PACz- and 2PACz/ TTP-DPA -based) experienced a rapid decline over the same duration. This remarkable thermal stability underscores the potential of TT derivatives for HSL of the next-generation photovoltaics. − …”

Section: Resultsmentioning

confidence: 96%

Enhancement of Efficiency of Perovskite Solar Cells with Hole-Selective Layers of Rationally Designed Thiazolo[5,4-d]thiazole Derivatives

Dabuliene,

Shi,

Leitonas

et al. 2024

ACS Appl. Mater. Interfaces

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We introduce thiazolo[5,4-d]thiazole (TT)-based derivatives featuring carbazole, phenothiazine, or triphenylamine donor units as hole-selective materials to enhance the performance of wide-bandgap perovskite solar cells (PSCs). The optoelectronic properties of the materials underwent thorough evaluation and were substantially fine-tuned through deliberate molecular design. Time-of-flight hole mobility TTs ranged from 4.33 × 10–5 to 1.63 × 10–3 cm2 V–1 s–1 (at an electric field of 1.6 × 105 V cm–1). Their ionization potentials ranged from −4.93 to −5.59 eV. Using density functional theory (DFT) calculations, it has been demonstrated that S0 → S1 transitions in TTs with carbazolyl or ditert-butyl-phenothiazinyl substituents are characterized by local excitation (LE). Mixed intramolecular charge transfer (ICT) and LE occurred for compounds containing ditert-butyl carbazolyl-, dimethoxy carbazolyl-, or alkoxy-substituted triphenylamino donor moieties. The selected derivatives of TT were used for the preparation of hole-selective layers (HSL) in PSC with the structure of glass/ITO/HSLs/Cs0.18FA0.82Pb(I0.8Br0.2)3/PEAI/PC61BM/BCP/Ag. The alkoxy-substituted triphenylamino containing TT (TTP-DPA) has been demonstrated to be an effective material for HSL. Its layer also functioned well as an interlayer, improving the surface of control HSL_2PACz (i.e., reducing the surface energy of 2PACz from 66.9 to 52.4 mN m–1), thus enabling precise control over perovskite growth energy level alignment and carrier extraction/transportation at the hole-selecting contact of PSCs. 2PACz/TTP-DPA-based devices showed an optimized performance of 19.1 and 37.0% under 1-sun and 3000 K LED (1000 lx) illuminations, respectively. These values represent improvements over those achieved by bare 2PACz-based devices, which attained efficiencies of 17.4 and 32.2%, respectively. These findings highlight the promising potential of TTs for the enhancement of the efficiencies of PSCs.

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Section: Resultsmentioning

confidence: 96%

Enhancement of Efficiency of Perovskite Solar Cells with Hole-Selective Layers of Rationally Designed Thiazolo[5,4-d]thiazole Derivatives

Dabuliene,

Shi,

Leitonas

et al. 2024

ACS Appl. Mater. Interfaces

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Improved photovoltaic performance and stability of perovskite solar cells by adoption of an n-type zwitterionic cathode interlayer

Abstract: Recently, inverted perovskite solar cells (PeSCs) have witnessed significant advancements; however, their long-term stability remains a challenge because of the oxidation of silver cathode to form AgI by mobile iodides....

Cited by 1 publication

References 47 publications

Enhancement of Efficiency of Perovskite Solar Cells with Hole-Selective Layers of Rationally Designed Thiazolo[5,4-d]thiazole Derivatives

Enhancement of Efficiency of Perovskite Solar Cells with Hole-Selective Layers of Rationally Designed Thiazolo[5,4-d]thiazole Derivatives

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