10.6% Certified Colloidal Quantum Dot Solar Cells via Solvent Polarity-Engineered Halide Passivation

被引：310

作者：

Lan, Xinzheng ^{[1
]}

Voznyy, Oleksandr ^{[1
]}

de Arquer, F. Pelayo Garcia ^{[1
]}

Liu, Mengxia ^{[1
]}

Xu, Jixian ^{[1
]}

Proppe, Andrew H. ^{[1
]}

Walters, Grant ^{[1
]}

Fan, Fengjia ^{[1
]}

Tan, Hairen ^{[1
]}

Liu, Min ^{[1
]}

Yang, Zhenyu ^{[1
]}

Hoogland, Sjoerd ^{[1
]}

Sargent, Edward H. ^{[1
]}

机构：

[1] Univ Toronto, Dept Elect & Comp Engn, 10 Kings Coll Rd, Toronto, ON M5S 3G4, Canada

来源：

NANO LETTERS | 2016年 / 16卷 / 07期

基金：

加拿大自然科学与工程研究理事会;

关键词：

PbS quantum dots; solar cells; solvent polarity; passivation; methylammonium iodide; NANOCRYSTALS; SOLIDS; PBS; TRANSPORT; MOBILITY;

D O I：

10.1021/acs.nanolett.6b01957

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Colloidal quantum dot (CQD) solar cells are solution-processed photovoltaics with broad spectral absorption tunability. Major advances in their efficiency have been made via improved CQD surface passivation and device architectures with enhanced charge carrier collection. Herein, we demonstrate a new strategy to improve further the passivation of CQDs starting from the solution phase. A cosolvent system is employed to tune the solvent polarity in order to achieve the solvation of methylammonium iodide (MAI) and the dispersion of hydrophobic PbS CQDs simultaneously in a homogeneous phase, otherwise not achieved in a single solvent. This process enables MAI to access the CQDs to confer improved passivation. This, in turn, allows for efficient charge extraction from a thicker photoactive layer device, leading to a certified solar cell power conversion efficiency of 10.6%, a new certified record in CQD photovoltaics.

引用

页码：4630 / 4634

页数：5

共 33 条

[1] Semiconductor clusters, nanocrystals, and quantum dots [J].

Alivisatos, AP .

SCIENCE, 1996, 271 (5251) :933-937

[2] Ligand Exchange and the Stoichiometry of Metal Chalcogenide Nanocrystals: Spectroscopic Observation of Facile Metal-Carboxylate Displacement and Binding [J].

Anderson, Nicholas C. ;

Hendricks, Mark P. ;

Choi, Joshua J. ;

Owen, Jonathan S. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2013, 135 (49) :18536-18548

[3] Record Charge Carrier Diffusion Length in Colloidal Quantum Dot Solids via Mutual Dot-To-Dot Surface Passivation [J].

Carey, Graham H. ;

Levina, Larissa ;

Comin, Riccardo ;

Voznyy, Oleksandr ;

Sargent, Edward H. .

ADVANCED MATERIALS, 2015, 27 (21) :3325-3330

[4] Bandlike Transport in Strongly Coupled and Doped Quantum Dot Solids: A Route to High-Performance Thin-Film Electronics [J].

Choi, Ji-Hyuk ;

Fafarman, Aaron T. ;

Oh, Soong Ju ;

Ko, Dong-Kyun ;

Kim, David K. ;

Diroll, Benjamin T. ;

Muramoto, Shin ;

Gillen, J. Greg ;

Murray, Christopher B. ;

Kagan, Cherie R. .

NANO LETTERS, 2012, 12 (05) :2631-2638

[5]

Chuang CHM, 2014, NAT MATER, V13, P796, DOI [10.1038/nmat3984, 10.1038/NMAT3984]

[6] Metal Halide Solid-State Surface Treatment for High Efficiency PbS and PbSe QD Solar Cells [J].

Crisp, Ryan W. ;

Kroupa, Daniel M. ;

Marshall, Ashley R. ;

Miller, Elisa M. ;

Zhang, Jianbing ;

Beard, Matthew C. ;

Luther, Joseph M. .

SCIENTIFIC REPORTS, 2015, 5

[7] Highly Dynamic Ligand Binding and Light Absorption Coefficient of Cesium Lead Bromide Perovskite Nanocrystals [J].

De Roo, Jonathan ;

Ibanez, Maria ;

Geiregat, Pieter ;

Nedelcu, Georgian ;

Walravens, Willem ;

Maes, Jorick ;

Martins, Jose C. ;

Van Driessche, Isabel ;

Koyalenko, Maksym V. ;

Hens, Zeger .

ACS NANO, 2016, 10 (02) :2071-2081

[8]

Doris SE, 2014, J AM CHEM SOC, V136, P15702, DOI [10.1021/ja508675t, 10.1021/ja508675T]

[9] A tunable library of substituted thiourea precursors to metal sulfide nanocrystals [J].

Hendricks, Mark P. ;

Campos, Michael P. ;

Cleveland, Gregory T. ;

Jen-La Plante, Ilan ;

Owen, Jonathan S. .

SCIENCE, 2015, 348 (6240) :1226-1230

[10] Colloidal PbS nanocrystals with size-tunable near-infrared emission: Observation of post-synthesis self-narrowing of the particle size distribution [J].

Hines, MA ;

Scholes, GD .

ADVANCED MATERIALS, 2003, 15 (21) :1844-1849

← 1 2 3 4 →