Improving energy level alignment by adenine for efficient and stable perovskite solar cells

Lisha XIE; Zhiyuan CAO; Jianwei WANG; Aili WANG; Shurong WANG; Yuying CUI; Yong XIANG; Xiaobin NIU; Feng HAO; Liming DING

doi:10.1016/j.nanoen.2020.104846

Improving energy level alignment by adenine for efficient and stable perovskite solar cells

Lisha XIE, Zhiyuan CAO, Jianwei WANG, Aili WANG, Shurong WANG, Yuying CUI, Yong XIANG, Xiaobin NIU, Feng HAO, Liming DING^*

^*Corresponding author for this work

Research output: Journal Publications › Journal Article (refereed) › peer-review

69 Citations (Scopus)

Abstract

NiO_x has been widely used as inorganic hole-transport layers (HTLs) in highly efficient hybrid perovskite solar cells (PSCs), however, the solution deposition usually induces pinhole and poor contact with perovskite. In this work, a small organic molecule adenine was used as surface modifier on NiO_x substrate for the energy level modulation. After coating adenine, a 0.1 eV energy level drop for NiO_x HTL, a higher crystallinity and larger grain size of perovskite layer, and an accelerated charge transport and extraction for device were achieved. Density functional theory (DFT) calculations also confirmed that the crystal structure of perovskite on NiO_x/adenine substrate was more stable. These benefits enable a higher open-circuit voltage (V_oc) and short-circuit current density (J_sc) in the corresponding devices with significantly enhanced moisture and light stability. Our work provides a novel strategy for modulation of energy level alignment between HTL and perovskites in related photovoltaic and other optoelectronic devices.

Original language	English
Article number	104846
Number of pages	9
Journal	Nano Energy
Volume	74
Early online date	22 Apr 2020
DOIs	https://doi.org/10.1016/j.nanoen.2020.104846
Publication status	Published - Aug 2020
Externally published	Yes

Bibliographical note

This work was financially supported by the National Natural Science Foundation of China NSFC (51702038) and the Recruitment Program for Young Professionals. L. Ding thanks the National Key Research and Development Program of China (2017YFA0206600) and the National Natural Science Foundation of China (51773045, 21772030, 51922032, 21961160720) for financial support. We thank Prof. Qinye Bao from East China Normal University for the UPS measurements and fruitful discussions.

Keywords

Crystallinity
Hole transport layer
Interface engineering
Perovskite
Stability

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.nanoen.2020.104846

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title = "Improving energy level alignment by adenine for efficient and stable perovskite solar cells",

abstract = "NiOx has been widely used as inorganic hole-transport layers (HTLs) in highly efficient hybrid perovskite solar cells (PSCs), however, the solution deposition usually induces pinhole and poor contact with perovskite. In this work, a small organic molecule adenine was used as surface modifier on NiOx substrate for the energy level modulation. After coating adenine, a 0.1 eV energy level drop for NiOx HTL, a higher crystallinity and larger grain size of perovskite layer, and an accelerated charge transport and extraction for device were achieved. Density functional theory (DFT) calculations also confirmed that the crystal structure of perovskite on NiOx/adenine substrate was more stable. These benefits enable a higher open-circuit voltage (Voc) and short-circuit current density (Jsc) in the corresponding devices with significantly enhanced moisture and light stability. Our work provides a novel strategy for modulation of energy level alignment between HTL and perovskites in related photovoltaic and other optoelectronic devices.",

keywords = "Crystallinity, Hole transport layer, Interface engineering, Perovskite, Stability",

author = "Lisha XIE and Zhiyuan CAO and Jianwei WANG and Aili WANG and Shurong WANG and Yuying CUI and Yong XIANG and Xiaobin NIU and Feng HAO and Liming DING",

note = "This work was financially supported by the National Natural Science Foundation of China NSFC (51702038) and the Recruitment Program for Young Professionals. L. Ding thanks the National Key Research and Development Program of China (2017YFA0206600) and the National Natural Science Foundation of China (51773045, 21772030, 51922032, 21961160720) for financial support. We thank Prof. Qinye Bao from East China Normal University for the UPS measurements and fruitful discussions.",

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doi = "10.1016/j.nanoen.2020.104846",

language = "English",

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journal = "Nano Energy",

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T1 - Improving energy level alignment by adenine for efficient and stable perovskite solar cells

AU - XIE, Lisha

AU - CAO, Zhiyuan

AU - WANG, Jianwei

AU - WANG, Aili

AU - WANG, Shurong

AU - CUI, Yuying

AU - XIANG, Yong

AU - NIU, Xiaobin

AU - HAO, Feng

AU - DING, Liming

N1 - This work was financially supported by the National Natural Science Foundation of China NSFC (51702038) and the Recruitment Program for Young Professionals. L. Ding thanks the National Key Research and Development Program of China (2017YFA0206600) and the National Natural Science Foundation of China (51773045, 21772030, 51922032, 21961160720) for financial support. We thank Prof. Qinye Bao from East China Normal University for the UPS measurements and fruitful discussions.

PY - 2020/8

Y1 - 2020/8

N2 - NiOx has been widely used as inorganic hole-transport layers (HTLs) in highly efficient hybrid perovskite solar cells (PSCs), however, the solution deposition usually induces pinhole and poor contact with perovskite. In this work, a small organic molecule adenine was used as surface modifier on NiOx substrate for the energy level modulation. After coating adenine, a 0.1 eV energy level drop for NiOx HTL, a higher crystallinity and larger grain size of perovskite layer, and an accelerated charge transport and extraction for device were achieved. Density functional theory (DFT) calculations also confirmed that the crystal structure of perovskite on NiOx/adenine substrate was more stable. These benefits enable a higher open-circuit voltage (Voc) and short-circuit current density (Jsc) in the corresponding devices with significantly enhanced moisture and light stability. Our work provides a novel strategy for modulation of energy level alignment between HTL and perovskites in related photovoltaic and other optoelectronic devices.

AB - NiOx has been widely used as inorganic hole-transport layers (HTLs) in highly efficient hybrid perovskite solar cells (PSCs), however, the solution deposition usually induces pinhole and poor contact with perovskite. In this work, a small organic molecule adenine was used as surface modifier on NiOx substrate for the energy level modulation. After coating adenine, a 0.1 eV energy level drop for NiOx HTL, a higher crystallinity and larger grain size of perovskite layer, and an accelerated charge transport and extraction for device were achieved. Density functional theory (DFT) calculations also confirmed that the crystal structure of perovskite on NiOx/adenine substrate was more stable. These benefits enable a higher open-circuit voltage (Voc) and short-circuit current density (Jsc) in the corresponding devices with significantly enhanced moisture and light stability. Our work provides a novel strategy for modulation of energy level alignment between HTL and perovskites in related photovoltaic and other optoelectronic devices.

KW - Crystallinity

KW - Hole transport layer

KW - Interface engineering

KW - Perovskite

KW - Stability

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DO - 10.1016/j.nanoen.2020.104846

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JO - Nano Energy

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Improving energy level alignment by adenine for efficient and stable perovskite solar cells

Abstract

Bibliographical note

Keywords

UN SDGs

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