Impact of Capacitive Effect and Ion Migration on the Hysteretic Behavior of Perovskite Solar Cells.

In the past five years, perovskite solar cells (PSCs) based on organometal halide perovskite have exhibited extraordinary photovoltaic (PV) performance. However, the PV measurements of PSCs have been widely recognized to depend on voltage scanning condition (hysteretic current density-voltage [J-V] behavior), as well as on voltage treatment history. In this study, we find that varied PSC responses are attributable to two causes. First, capacitive effect associated with electrode polarization provides a slow transient non-steady-state photocurrent that modifies the J-V response. Second, modification of interfacial barriers induced by ion migration can modulate charge-collection efficiency so that it causes a pseudo-steady-state photocurrent, which changes according to previous voltage conditioning. Both phenomena are strongly influenced by ions accumulating at outer interfaces, but their electrical and PV effects are different. The time scale for decay of capacitive current is on the order of seconds, whereas the slow redistribution of mobile ions requires several minutes.

[1]  Juan Bisquert,et al.  Photoinduced Giant Dielectric Constant in Lead Halide Perovskite Solar Cells. , 2014, The journal of physical chemistry letters.

[2]  Tsutomu Miyasaka,et al.  Emergence of Hysteresis and Transient Ferroelectric Response in Organo-Lead Halide Perovskite Solar Cells. , 2015, The journal of physical chemistry letters.

[3]  Yuanyuan Zhou,et al.  Direct Observation of Ferroelectric Domains in Solution-Processed CH3NH3PbI3 Perovskite Thin Films. , 2014, The journal of physical chemistry letters.

[4]  Martijn Kemerink,et al.  Modeling Anomalous Hysteresis in Perovskite Solar Cells. , 2015, The journal of physical chemistry letters.

[5]  Nam-Gyu Park,et al.  Growth of CH3NH3PbI3 cuboids with controlled size for high-efficiency perovskite solar cells. , 2014, Nature nanotechnology.

[6]  Fujun Zhang,et al.  Dynamic interface charge governing the current-voltage hysteresis in perovskite solar cells. , 2015, Physical chemistry chemical physics : PCCP.

[7]  Eric T. Hoke,et al.  Reversible photo-induced trap formation in mixed-halide hybrid perovskites for photovoltaics† †Electronic supplementary information (ESI) available: Experimental details, PL, PDS spectra and XRD patterns. See DOI: 10.1039/c4sc03141e Click here for additional data file. , 2014, Chemical science.

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

[9]  Juan Bisquert,et al.  Capacitive Dark Currents, Hysteresis, and Electrode Polarization in Lead Halide Perovskite Solar Cells. , 2015, The journal of physical chemistry letters.

[10]  Prashant V Kamat,et al.  Best Practices in Perovskite Solar Cell Efficiency Measurements. Avoiding the Error of Making Bad Cells Look Good. , 2015, The journal of physical chemistry letters.

[11]  Kai Zhu,et al.  Interface band structure engineering by ferroelectric polarization in perovskite solar cells , 2015 .

[12]  Chiara Bertarelli,et al.  17.6% stabilized efficiency in low-temperature processed planar perovskite solar cells , 2015 .

[13]  Fujun Zhang,et al.  Anomalously large interface charge in polarity-switchable photovoltaic devices: an indication of mobile ions in organic–inorganic halide perovskites , 2015 .

[14]  Henry J. Snaith,et al.  Efficient planar heterojunction perovskite solar cells by vapour deposition , 2013, Nature.

[15]  Leone Spiccia,et al.  A fast deposition-crystallization procedure for highly efficient lead iodide perovskite thin-film solar cells. , 2014, Angewandte Chemie.

[16]  Seong Sik Shin,et al.  Fabrication of metal-oxide-free CH3NH3PbI3 perovskite solar cells processed at low temperature , 2015 .

[17]  Heng Li,et al.  Hysteresis Analysis Based on the Ferroelectric Effect in Hybrid Perovskite Solar Cells. , 2014, The journal of physical chemistry letters.

[18]  Eric T. Hoke,et al.  Hysteresis and transient behavior in current–voltage measurements of hybrid-perovskite absorber solar cells , 2014 .

[19]  Sandeep Kumar Pathak,et al.  Ultrasmooth organic–inorganic perovskite thin-film formation and crystallization for efficient planar heterojunction solar cells , 2015, Nature Communications.

[20]  Nam-Gyu Park,et al.  Parameters Affecting I-V Hysteresis of CH3NH3PbI3 Perovskite Solar Cells: Effects of Perovskite Crystal Size and Mesoporous TiO2 Layer. , 2014, The journal of physical chemistry letters.

[21]  Qingfeng Dong,et al.  Giant switchable photovoltaic effect in organometal trihalide perovskite devices. , 2015, Nature materials.

[22]  N. Park,et al.  Lead Iodide Perovskite Sensitized All-Solid-State Submicron Thin Film Mesoscopic Solar Cell with Efficiency Exceeding 9% , 2012, Scientific Reports.

[23]  Emilio Palomares,et al.  Optoelectronic Studies of Methylammonium Lead Iodide Perovskite Solar Cells with Mesoporous TiO₂: Separation of Electronic and Chemical Charge Storage, Understanding Two Recombination Lifetimes, and the Evolution of Band Offsets during J-V Hysteresis. , 2015, Journal of the American Chemical Society.

[24]  Yongbo Yuan,et al.  Origin and elimination of photocurrent hysteresis by fullerene passivation in CH3NH3PbI3 planar heterojunction solar cells , 2014, Nature Communications.

[25]  Shenghao Wang,et al.  Temperature-dependent hysteresis effects in perovskite-based solar cells , 2015 .

[26]  Nripan Mathews,et al.  Incorporation of Cl into sequentially deposited lead halide perovskite films for highly efficient mesoporous solar cells. , 2014, Nanoscale.

[27]  Yang Yang,et al.  Interface engineering of highly efficient perovskite solar cells , 2014, Science.

[28]  Garry Rumbles,et al.  Heterojunction modification for highly efficient organic-inorganic perovskite solar cells. , 2014, ACS nano.

[29]  Qingfeng Dong,et al.  Efficient, high yield perovskite photovoltaic devices grown by interdiffusion of solution-processed precursor stacking layers , 2014 .

[30]  J. Teuscher,et al.  Correction to Impedance Spectroscopic Analysis of Lead Iodide Perovskite-Sensitized Solid-State Solar Cells , 2014 .

[31]  M. Grätzel,et al.  Sequential deposition as a route to high-performance perovskite-sensitized solar cells , 2013, Nature.

[32]  H. Tao,et al.  Efficient hole-blocking layer-free planar halide perovskite thin-film solar cells , 2015, Nature Communications.

[33]  Keitaro Sodeyama,et al.  First-Principles Study of Ion Diffusion in Perovskite Solar Cell Sensitizers. , 2015, Journal of the American Chemical Society.

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

[35]  Juan Bisquert,et al.  Slow Dynamic Processes in Lead Halide Perovskite Solar Cells. Characteristic Times and Hysteresis. , 2014, The journal of physical chemistry letters.

[36]  Sang Il Seok,et al.  High-performance photovoltaic perovskite layers fabricated through intramolecular exchange , 2015, Science.

[37]  Sang Il Seok,et al.  Solvent engineering for high-performance inorganic-organic hybrid perovskite solar cells. , 2014, Nature materials.

[38]  D. Schlettwein,et al.  I–V hysteresis of methylammonium lead halide perovskite films on microstructured electrode arrays: Dependence on preparation route and voltage scale , 2016 .

[39]  Peng Gao,et al.  Impedance spectroscopic analysis of lead iodide perovskite-sensitized solid-state solar cells. , 2014, ACS nano.

[40]  Oleksandr Voznyy,et al.  Perovskite–fullerene hybrid materials suppress hysteresis in planar diodes , 2015, Nature Communications.

[41]  J. Bisquert,et al.  Defect migration in methylammonium lead iodide and its role in perovskite solar cell operation , 2015 .

[42]  M. Green,et al.  The emergence of perovskite solar cells , 2014, Nature Photonics.

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

[44]  Tsutomu Miyasaka,et al.  Organometal halide perovskites as visible-light sensitizers for photovoltaic cells. , 2009, Journal of the American Chemical Society.

[45]  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 .