Systematic investigation of the impact of operation conditions on the degradation behaviour of perovskite solar cells

Perovskite solar cells have achieved power-conversion efficiency values approaching those of established photovoltaic technologies, making the reliable assessment of their operational stability the next essential step towards commercialization. Although studies increasingly often involve a form of stability characterization, they are conducted in non-standardized ways, which yields data that are effectively incomparable. Furthermore, stability assessment of a novel material system with its own peculiarities might require an adjustment of common standards. Here, we investigate the effects of different environmental factors and electrical load on the ageing behaviour of perovskite solar cells. On this basis, we comment on our perceived relevance of the different ways these are currently aged. We also demonstrate how the results of the experiments can be distorted and how to avoid the common pitfalls. We hope this work will initiate discussion on how to age perovskite solar cells and facilitate the development of consensus stability measurement protocols.Perovskite solar cells suffer from poor operational stability. Stability measurement conditions used in various studies differ widely. Here, Domanski et al. systematically study environmentally induced degradation in an effort to drive the community towards a consensus on how to age perovskite solar cells.

[1]  Sandeep Kumar Pathak,et al.  Overcoming ultraviolet light instability of sensitized TiO2 with meso-superstructured organometal tri-halide perovskite solar cells , 2013, Nature Communications.

[2]  J. Durrant,et al.  Performance and Stability of Lead Perovskite/TiO2, Polymer/PCBM, and Dye Sensitized Solar Cells at Light Intensities up to 70 Suns , 2014, Advanced materials.

[3]  M. Grätzel,et al.  A hole-conductor–free, fully printable mesoscopic perovskite solar cell with high stability , 2014, Science.

[4]  Feng Liu,et al.  Kinetics of Ion Transport in Perovskite Active Layers and Its Implications for Active Layer Stability. , 2015, Journal of the American Chemical Society.

[5]  Jeffrey A. Christians,et al.  Transformation of the excited state and photovoltaic efficiency of CH3NH3PbI3 perovskite upon controlled exposure to humidified air. , 2015, Journal of the American Chemical Society.

[6]  Hongsuk Suh,et al.  Long-term stable polymer solar cells with significantly reduced burn-in loss , 2014, Nature Communications.

[7]  Michael Saliba,et al.  Inverted Current–Voltage Hysteresis in Mixed Perovskite Solar Cells: Polarization, Energy Barriers, and Defect Recombination , 2016 .

[8]  M. Ko,et al.  Enhancing Stability of Perovskite Solar Cells to Moisture by the Facile Hydrophobic Passivation. , 2015, ACS applied materials & interfaces.

[9]  F. Giordano,et al.  Highly Efficient and Stable Perovskite Solar Cells based on a Low‐Cost Carbon Cloth , 2016 .

[10]  Y. Chai,et al.  Nonstoichiometric acid–base reaction as reliable synthetic route to highly stable CH3NH3PbI3 perovskite film , 2016, Nature Communications.

[11]  Saif A. Haque,et al.  Light and oxygen induced degradation limits the operational stability of methylammonium lead triiodide perovskite solar cells , 2016 .

[12]  N. Park,et al.  Effect of Selective Contacts on the Thermal Stability of Perovskite Solar Cells. , 2017, ACS applied materials & interfaces.

[13]  Thomas Pfadler,et al.  Erroneous efficiency reports harm organic solar cell research , 2014, Nature Photonics.

[14]  Federico Bella,et al.  Improving efficiency and stability of perovskite solar cells with photocurable fluoropolymers , 2016, Science.

[15]  A. Salleo,et al.  The Mechanism of Burn‐in Loss in a High Efficiency Polymer Solar Cell , 2012, Advanced materials.

[16]  Nakita K. Noel,et al.  Anomalous Hysteresis in Perovskite Solar Cells. , 2014, The journal of physical chemistry letters.

[17]  Ye Chen,et al.  Thermal and environmental stability of semi-transparent perovskite solar cells for tandems by a solution-processed nanoparticle buffer layer and sputtered ITO electrode , 2016, 2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC).

[18]  Michael Grätzel,et al.  The rapid evolution of highly efficient perovskite solar cells , 2017 .

[19]  P. Kamat,et al.  Evolution of Chemical Composition, Morphology, and Photovoltaic Efficiency of CH3NH3PbI3 Perovskite under Ambient Conditions , 2016 .

[20]  G. Boschloo,et al.  High Temperature‐Stable Perovskite Solar Cell Based on Low‐Cost Carbon Nanotube Hole Contact , 2017, Advanced materials.

[21]  L. Quan,et al.  SOLAR CELLS: Efficient and stable solution‐processed planar perovskite solar cells via contact passivation , 2017 .

[22]  Anders Hagfeldt,et al.  Migration of cations induces reversible performance losses over day/night cycling in perovskite solar cells , 2017 .

[23]  M. Grätzel,et al.  Thermal Behavior of Methylammonium Lead- trihalide Perovskite Photovoltaic Light Harvesters , 2014 .

[24]  Thomas Rath,et al.  The Role of Oxygen in the Degradation of Methylammonium Lead Trihalide Perovskite Photoactive Layers. , 2015, Angewandte Chemie.

[25]  Jinli Yang,et al.  Investigation of CH3NH3PbI3 degradation rates and mechanisms in controlled humidity environments using in situ techniques. , 2015, ACS nano.

[26]  Anders Hagfeldt,et al.  Highly efficient and stable planar perovskite solar cells by solution-processed tin oxide , 2016 .

[27]  Min Gyu Kim,et al.  Colloidally prepared La-doped BaSnO3 electrodes for efficient, photostable perovskite solar cells , 2017, Science.

[28]  Anders Hagfeldt,et al.  Incorporation of rubidium cations into perovskite solar cells improves photovoltaic performance , 2016, Science.

[29]  S. Meloni,et al.  Ionic polarization-induced current–voltage hysteresis in CH3NH3PbX3 perovskite solar cells , 2016, Nature Communications.

[30]  Keith J Stevenson,et al.  Probing the Intrinsic Thermal and Photochemical Stability of Hybrid and Inorganic Lead Halide Perovskites. , 2017, The journal of physical chemistry letters.

[31]  Aron Walsh,et al.  Thermodynamic Origin of Photoinstability in the CH3NH3Pb(I1–xBrx)3 Hybrid Halide Perovskite Alloy , 2016, The journal of physical chemistry letters.

[32]  Kyungjin Cho,et al.  UV Degradation and Recovery of Perovskite Solar Cells , 2016, Scientific Reports.

[33]  Claudine Katan,et al.  Light-activated photocurrent degradation and self-healing in perovskite solar cells , 2016, Nature Communications.

[34]  Wei Chen,et al.  Efficient and stable large-area perovskite solar cells with inorganic charge extraction layers , 2015, Science.

[35]  Peng Gao,et al.  Silolothiophene-linked triphenylamines as stable hole transporting materials for high efficiency perovskite solar cells , 2015 .

[36]  Nripan Mathews,et al.  A large area (70 cm2) monolithic perovskite solar module with a high efficiency and stability , 2016 .

[37]  Yue Hu,et al.  Stable Large‐Area (10 × 10 cm2) Printable Mesoscopic Perovskite Module Exceeding 10% Efficiency , 2017 .

[38]  Anders Hagfeldt,et al.  Cesium-containing triple cation perovskite solar cells: improved stability, reproducibility and high efficiency† †Electronic supplementary information (ESI) available. See DOI: 10.1039/c5ee03874j Click here for additional data file. , 2016, Energy & environmental science.

[39]  Mohammad Khaja Nazeeruddin,et al.  Understanding the rate-dependent J–V hysteresis, slow time component, and aging in CH3NH3PbI3 perovskite solar cells: the role of a compensated electric field , 2015 .

[40]  Aslihan Babayigit,et al.  Intrinsic Thermal Instability of Methylammonium Lead Trihalide Perovskite , 2015 .

[41]  Aron Walsh,et al.  Ionic transport in hybrid lead iodide perovskite solar cells , 2015, Nature Communications.

[42]  Emmanuel Kymakis,et al.  Graphene Interface Engineering for Perovskite Solar Modules: 12.6% Power Conversion Efficiency over 50 cm2 Active Area , 2017 .

[43]  Qi Chen,et al.  Improved air stability of perovskite solar cells via solution-processed metal oxide transport layers. , 2016, Nature nanotechnology.

[44]  Jonathan P. Mailoa,et al.  23.6%-efficient monolithic perovskite/silicon tandem solar cells with improved stability , 2017, Nature Energy.

[45]  Anders Hagfeldt,et al.  Not All That Glitters Is Gold: Metal-Migration-Induced Degradation in Perovskite Solar Cells. , 2016, ACS nano.

[46]  A. Di Carlo,et al.  In situ observation of heat-induced degradation of perovskite solar cells , 2016, Nature Energy.

[47]  Suren A. Gevorgyan,et al.  Consensus stability testing protocols for organic photovoltaic materials and devices , 2011 .

[48]  Mohammad Khaja Nazeeruddin,et al.  One-Year stable perovskite solar cells by 2D/3D interface engineering , 2017, Nature Communications.

[49]  Neil C. Greenham,et al.  Oxygen Degradation in Mesoporous Al2O3/CH3NH3PbI3‐xClx Perovskite Solar Cells: Kinetics and Mechanisms , 2016 .

[50]  Henry J. Snaith,et al.  Enhanced UV-light stability of planar heterojunction perovskite solar cells with caesium bromide interface modification , 2016 .