Optimization of SnO2 electron transport layer for efficient planar perovskite solar cells with very low hysteresis

被引：39

作者：

Eliwi, Abed Alrhman ^{[1
]}

Malekshahi Byranvand, Mahdi ^{[1
,2
,3
,4
]}

Fassl, Paul ^{[1
,2
]}

Khan, Motiur Rahman ^{[1
]}

Hossain, Ihteaz Muhaimeen ^{[1
,2
]}

Frericks, Markus ^{[5
,6
]}

Ternes, Simon ^{[1
,2
]}

Abzieher, Tobias ^{[1
,7
]}

Schwenzer, Jonas A. ^{[1
]}

Mayer, Thomas ^{[5
]}

Hofmann, Jan P. ^{[5
]}

Richards, Bryce S. ^{[1
,2
]}

Lemmer, Uli ^{[1
,2
]}

Saliba, Michael ^{[3
,4
]}

Paetzold, Ulrich W. ^{[1
,2
]}

机构：

[1] Karlsruhe Inst Technol, Light Technol Inst, Engesserstr 13, D-76131 Karlsruhe, Germany

[2] Karlsruhe Inst Technol, Inst Microstruct Technol, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

[3] Univ Stuttgart, Inst Photovolta IPV, Stuttgart, Germany

[4] Forschungszentrum Julich, Photovolta IEK5, Julich, Germany

[5] Tech Univ Darmstadt, Dept Mat & Earth Sci, Surface Sci Lab, Otto Berndt Str 3, D-64287 Darmstadt, Germany

[6] InnovationLab GmbH, Speyerer Str 4, D-69115 Heidelberg, Germany

[7] Natl Renewable Energy Lab, 15013 Denver Pkwy, Golden, CO 80401 USA

来源：

MATERIALS ADVANCES | 2022年 / 3卷 / 01期

关键词：

ORGANOMETAL HALIDE PEROVSKITES; OPEN-CIRCUIT VOLTAGE; RECOMBINATION; PHOTOEMISSION; GUANIDINIUM; CHLORIDE; SURFACE; LIGHT; FILMS;

D O I：

10.1039/d1ma00585e

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanostructured tin oxide (SnO2) is a very promising electron transport layer (ETL) for perovskite solar cells (PSCs) that allows low-temperature processing in the planar n-i-p architecture. However, minimizing current-voltage (J-V) hysteresis and optimizing charge extraction for PSCs in this architecture remains a challenge. In response to this, we study and optimize different types of single- and bilayer SnO2 ETLs. Detailed characterization of the optoelectronic properties reveals that a bilayer ETL composed of lithium (Li)-doped compact SnO2 (c(Li)-SnO2) at the bottom and potassium-capped SnO2 nanoparticle layers (NP-SnO2) at the top enhances the electron extraction and charge transport properties of PSCs and reduces the degree of ion migration. This results in an improved PCE and a strongly reduced J-V hysteresis for PSCs with a bilayer c(Li)-NP-SnO2 ETL as compared to reference PSCs with a single-layer or undoped bilayer ETL. The champion PSC with c(Li)-NP-SnO2 ETL shows a high stabilized PCE of up to 18.5% compared to 15.7%, 12.5% and 16.3% for PSCs with c-SnO2, c(Li)-SnO2 and c-NP-SnO2 as ETL, respectively.

引用

页码：456 / 466

页数：11

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