Mitigating Iodine Diffusion by a MoO3–Organic Composite Hole Transport Layer for Stable Perovskite Solar Cells,ACS Energy Letters

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Mitigating Iodine Diffusion by a MoO3–Organic Composite Hole Transport Layer for Stable Perovskite Solar Cells
ACS Energy Letters ( IF 19.3 ) Pub Date : 2023-11-03 , DOI: 10.1021/acsenergylett.3c01873
Jisu Hong _{1,

2} , Zhaojian Xu ₁ , Dominique Lungwitz ₁ , Jonathan Scott ₁ , Holly M. Johnson ₁ , Yun-Hi Kim _{2,

3} , Antoine Kahn ₁ , Barry P. Rand _{1,

4}

Affiliation

Halide perovskite solar cells (PSCs) exhibit commercialization potential, but long-term stability still must be addressed. Among various products of perovskite decomposition, iodine species are of considerable concern due to their high vapor pressure and corrosive nature. To address this, a small-molecule hole transport layer (HTL), 4,4′,4″-tris[(3-methylphenyl)phenylamino]triphenylamine (m-MTDATA), is used; mixing it with molybdenum trioxide (MoO₃) p-dopes the layer and slows iodine permeation. We demonstrate that m-MTDATA:MoO₃ HTLs employed in PSCs improve stability under both thermal and voltage bias stress compared to devices with a conventional doped 2,2′,7,7′-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene (spiro-OMeTAD) HTL.

中文翻译：

通过 MoO3-有机复合空穴传输层减轻稳定钙钛矿太阳能电池的碘扩散

卤化物钙钛矿太阳能电池（PSC）具有商业化潜力，但仍需解决长期稳定性问题。在钙钛矿分解的各种产物中，碘物质由于其高蒸气压和腐蚀性而备受关注。为了解决这个问题，使用了小分子空穴传输层 (HTL)，4,4',4"-三[(3-甲基苯基)苯氨基]三苯胺 (m-MTDATA)；将其与三氧化钼 (MoO ₃ )混合， p掺杂该层并减缓碘渗透。我们证明，与具有传统掺杂 2,2',7,7'-四[ N , N -二(4-甲氧基苯基)的器件相比，PSC 中采用的m-MTDATA:MoO ₃ HTL 提高了热和偏压应力下的稳定性)氨基]-9,9'-螺二芴 (spiro-OMeTAD) HTL。

更新日期：2023-11-03

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