Surface Planarization and Chemical Adhesion Enable 25.0% Efficient Perovskite Single-Crystal Solar Cells

IF 9.6 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2025-03-26 DOI:10.1021/acsmaterialslett.4c0254910.1021/acsmaterialslett.4c02549

Mudeha Shafat Khan, Partha Maity, Khulud Almasabi, Bashir E. Hasanov, Muhammad Naufal Lintangpradipto, Renqian Zhou, Wasim J. Mir, Tariq Sheikh, Abdul-Hamid Emwas, Mohamed Nejib Hedhili, Mutalifu Abulikemu, Omar F. Mohammed and Osman M. Bakr*,

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引用次数: 0

Abstract

Polycrystalline perovskite solar cells (PSCs) have achieved record efficiencies through facile passivation strategies during crystallization. By contrast, single-crystal PSCs face unique challenges. Their growth requires pristine, additive-free conditions, and controlling facet passivation remains difficult both during and after crystallization. These limitations primarily manifest as higher trap density at interfaces with charge-transport layers rather than within the crystal bulk. To address this challenge in single-crystal PSCs, we modified the hole-transport layer (HTL) surface by using a hydrophilic dielectric polymer. This treatment prevents charge leakage near pinholes while maintaining the single crystal adhesion. Our champion device achieved a high fill factor of 0.82, a large V_oc of 1.08 V, and a record-setting power-conversion efficiency of 25.0% for single-crystal PSCs. Furthermore, the polymer’s hydrophilic properties, combined with strong crystal adhesion, enhanced the device’s operational stability. This work advances single-crystal PSC technology by addressing critical interfacial engineering challenges through a strategic HTL surface modification.

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表面平面化和化学粘附使25.0%高效钙钛矿单晶太阳能电池成为可能

多晶钙钛矿太阳能电池（PSCs）在结晶过程中通过易于钝化策略实现了创纪录的效率。相比之下，单晶psc面临着独特的挑战。它们的生长需要原始的，无添加剂的条件，并且在结晶期间和结晶后控制面钝化仍然是困难的。这些限制主要表现在与电荷输运层的界面处的陷阱密度较高，而不是在晶体体内。为了解决单晶psc中的这一挑战，我们使用亲水性介电聚合物修饰了空穴传输层（HTL）表面。这种处理可以防止针孔附近的电荷泄漏，同时保持单晶的附着力。我们的冠军器件实现了0.82的高填充因子，1.08 V的大Voc，以及创纪录的25.0%的单晶psc功率转换效率。此外，聚合物的亲水性，结合强大的晶体附着力，增强了设备的操作稳定性。这项工作通过战略性的html表面修饰来解决关键的界面工程挑战，从而推进了单晶PSC技术。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.