Formation of High-Performance Multi-Cation Halide Perovskites Photovoltaics by δ-CsPbI3/δ-RbPbI3 Seed-Assisted Heterogeneous Nucleation

被引：46

作者：

Alharbi, Essa A. ^{[1
]}

Baumeler, Thomas P. ^{[1
]}

Krishna, Anurag ^{[2
]}

Alyamani, Ahmed Y. ^{[3
]}

Eickemeyer, Felix T. ^{[1
]}

Ouellette, Olivier ^{[1
]}

Pan, Linfeng ^{[2
]}

Alghamdi, Fahad S. ^{[3
]}

Wang, Zaiwei ^{[2
]}

Alotaibi, Mohammad Hayal ^{[3
]}

Yang, Bowen ^{[2
]}

Almalki, Masaud ^{[1
]}

Mensi, Mounir D. ^{[4
]}

Albrithen, Hamad ^{[3
,5
,6
,7
]}

Albadri, Abdulrahman ^{[3
]}

Hagfeldt, Anders ^{[2
,8
]}

Zakeeruddin, Shaik M. ^{[1
]}

Gratzel, Michael ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Lab Photon & Interfaces, Inst Chem Sci & Engn, Sch Basic Sci, CH-1015 Lausanne, Switzerland

[2] Ecole Polytech Fed Lausanne, Lab Photomol Sci, Inst Chem Sci & Engn, Sch Basic Sci, CH-1015 Lausanne, Switzerland

[3] Natl Ctr Nanotechnol King Abdulaziz City Sci & Te, Riyadh 11442, Saudi Arabia

[4] Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn ISIC, CH-1950 Sion, Switzerland

[5] KA CARE Energy Res & Innovat Ctr Riyadh, Riyadh, Saudi Arabia

[6] King Saud Univ, Lab Appl Sensing Res, King Abdullah Inst Nanotechnol Aramco, Riyadh 11451, Saudi Arabia

[7] King Saud Univ, Coll Sci, Dept Phys & Astron, Res Chair Tribol Surface & Interface Sci, Riyadh 11451, Saudi Arabia

[8] Uppsala Univ, Dept Chem, Angstrom Lab, Box 523, S-75120 Uppsala, Sweden

来源：

ADVANCED ENERGY MATERIALS | 2021年 / 11卷 / 16期

基金：

瑞士国家科学基金会; 欧盟地平线“2020”; 加拿大自然科学与工程研究理事会;

关键词：

compositional engineering; Perovskite solar cells; stability; two step methods;

D O I：

10.1002/aenm.202003785

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The performance of perovskite solar cells is highly dependent on the fabrication method; thus, controlling the growth mechanism of perovskite crystals is a promising way towards increasing their efficiency and stability. Herein, a multi-cation halide composition of perovskite solar cells is engineered via the two-step sequential deposition method. Strikingly, it is found that adding mixtures of 1D polymorphs of orthorhombic delta-RbPbI3 and delta-CsPbI3 to the PbI2 precursor solution induces the formation of porous mesostructured hexagonal films. This porosity greatly facilitates the heterogeneous nucleation and the penetration of FA (formamidinium)/MA (methylammonium) cations within the PbI2 film. Thus, the subsequent conversion of PbI2 into the desired multication cubic alpha-structure by exposing it to a solution of formamidinium methylammonium halides is greatly enhanced. During the conversion step, the delta-CsPbI3 also is fully integrated into the 3D mixed cation perovskite lattice, which exhibits high crystallinity and superior optoelectronic properties. The champion device shows a power conversion efficiency (PCE) over 22%. Furthermore, these devices exhibit enhanced operational stability, with the best device retaining more than 90% of its initial value of PCE under 1 Sun illumination with maximum power point tracking for 400 h.

引用

页数：10

共 71 条

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