The Controlling Mechanism for Potential Loss in CH3NH3PbBr3 Hybrid Solar Cells

Kai Zhu; Mengjin Yang; Xiaojia Zheng; Bo Chen; Congcong Wu; Shashank Priya; Bruce Orler; Robert Moore

doi:10.1021/acsenergylett.6b00215

The Controlling Mechanism for Potential Loss in CH3NH3PbBr3 Hybrid Solar Cells

Kai Zhu, Mengjin Yang, Xiaojia Zheng, Bo Chen, Congcong Wu, Shashank Priya, Bruce Orler, Robert Moore

Virginia Tech

Research output: Contribution to journal › Article › peer-review

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Abstract

We investigated moisture and thermal stability of MAPbBr₃ perovskite material. Cubic MAPbBr₃ was found to be moisture-insensitive and can avoid the thermal stability issues introduced by low-temperature phase transition in MAPbI₃. MAPbBr₃ and MAPbI₃ hybrid solar cells with efficiencies of ∼7.1% and ∼15.5%, respectively, were fabricated, and we identified the correlation between the working temperature, light intensity, and the photovoltaic performance. No charge-carrier transport barriers were found in the MAPbBr₃ and MAPbI₃ solar cells. The MAPbBr₃ solar cell displays a better stability under high working temperature because of its close-packed crystal structure. Temperature-dependent photocurrent-voltage characteristics indicate that, unlike the MAPbI₃ solar cell with an activation energy (E_A) nearly equal to its band gap (E_g), the E_A for the MAPbBr₃ solar cell is much lower than its E_g. This indicates that a high interface recombination process limits the photovoltage and consequently the device performance of the MAPbBr₃ solar cell.

Original language	American English
Pages (from-to)	424-430
Number of pages	7
Journal	ACS Energy Letters
Volume	1
Issue number	2
DOIs	https://doi.org/10.1021/acsenergylett.6b00215 https://doi.org/10.1021/acsenergylett.6b00215
State	Published - 12 Aug 2016

Bibliographical note

Publisher Copyright:
© 2016 American Chemical Society.

NREL Publication Number

NREL/JA-5900-66015

Keywords

activation energy
interface recombination
perovskite solar cell
potential loss
transition temperature

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title = "The Controlling Mechanism for Potential Loss in CH3NH3PbBr3 Hybrid Solar Cells",

abstract = "We investigated moisture and thermal stability of MAPbBr3 perovskite material. Cubic MAPbBr3 was found to be moisture-insensitive and can avoid the thermal stability issues introduced by low-temperature phase transition in MAPbI3. MAPbBr3 and MAPbI3 hybrid solar cells with efficiencies of ∼7.1% and ∼15.5%, respectively, were fabricated, and we identified the correlation between the working temperature, light intensity, and the photovoltaic performance. No charge-carrier transport barriers were found in the MAPbBr3 and MAPbI3 solar cells. The MAPbBr3 solar cell displays a better stability under high working temperature because of its close-packed crystal structure. Temperature-dependent photocurrent-voltage characteristics indicate that, unlike the MAPbI3 solar cell with an activation energy (EA) nearly equal to its band gap (Eg), the EA for the MAPbBr3 solar cell is much lower than its Eg. This indicates that a high interface recombination process limits the photovoltage and consequently the device performance of the MAPbBr3 solar cell.",

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AU - Zhu, Kai

AU - Yang, Mengjin

AU - Zheng, Xiaojia

AU - Chen, Bo

AU - Wu, Congcong

AU - Priya, Shashank

AU - Orler, Bruce

AU - Moore, Robert

PY - 2016/8/12

Y1 - 2016/8/12

N2 - We investigated moisture and thermal stability of MAPbBr3 perovskite material. Cubic MAPbBr3 was found to be moisture-insensitive and can avoid the thermal stability issues introduced by low-temperature phase transition in MAPbI3. MAPbBr3 and MAPbI3 hybrid solar cells with efficiencies of ∼7.1% and ∼15.5%, respectively, were fabricated, and we identified the correlation between the working temperature, light intensity, and the photovoltaic performance. No charge-carrier transport barriers were found in the MAPbBr3 and MAPbI3 solar cells. The MAPbBr3 solar cell displays a better stability under high working temperature because of its close-packed crystal structure. Temperature-dependent photocurrent-voltage characteristics indicate that, unlike the MAPbI3 solar cell with an activation energy (EA) nearly equal to its band gap (Eg), the EA for the MAPbBr3 solar cell is much lower than its Eg. This indicates that a high interface recombination process limits the photovoltage and consequently the device performance of the MAPbBr3 solar cell.

AB - We investigated moisture and thermal stability of MAPbBr3 perovskite material. Cubic MAPbBr3 was found to be moisture-insensitive and can avoid the thermal stability issues introduced by low-temperature phase transition in MAPbI3. MAPbBr3 and MAPbI3 hybrid solar cells with efficiencies of ∼7.1% and ∼15.5%, respectively, were fabricated, and we identified the correlation between the working temperature, light intensity, and the photovoltaic performance. No charge-carrier transport barriers were found in the MAPbBr3 and MAPbI3 solar cells. The MAPbBr3 solar cell displays a better stability under high working temperature because of its close-packed crystal structure. Temperature-dependent photocurrent-voltage characteristics indicate that, unlike the MAPbI3 solar cell with an activation energy (EA) nearly equal to its band gap (Eg), the EA for the MAPbBr3 solar cell is much lower than its Eg. This indicates that a high interface recombination process limits the photovoltage and consequently the device performance of the MAPbBr3 solar cell.

KW - activation energy

KW - interface recombination

KW - perovskite solar cell

KW - potential loss

KW - transition temperature

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JF - ACS Energy Letters

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ER -

The Controlling Mechanism for Potential Loss in CH3NH3PbBr3 Hybrid Solar Cells

Abstract

Bibliographical note

NREL Publication Number

Keywords

UN SDGs

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