[1] Kojima A, Teshima K, Shirai Y, et al. Organometal Halide Perovskites as Visible-light Sensitizers for Photovoltaic cells[J]. Journal of the American Chemical Society, 2009, 131(17):6050-6051.
[2] Kim H S, Lee C R, Im J H, et al. Lead Iodide Perovskite Sensitized All-Solid-State Submicron Thin Film Mesoscopic Solar Cell with Efficiency Exceeding 9%[J]. Scientific Reports, 2012, 2: 6022-6025.
[3] https://www.nrel.gov/pv/cell-efficiency.html
[4] Aeineh N, Barea E M, Behjat A, et al. Inorganic Surface Engineering to Enhance Perovskite Solar Cell Efficiency[J]. ACS Applied Materials & Interfaces, 2017, 9(15):13181-13187.
[5] Han G S, Song Y H, Jin Y U, et al. Reduced Graphene Oxide/Mesoporous TiO2 nanocomposite Based Perovskite Solar Cells [J].ACS Applied Materials & Interfaces, 2015, 7(42):23521–23526.
[6] Huang J, Yu X, Xie J, et al. Ambient Engineering for High Performance Organic-Inorganic Perovskite Hybrid Solar Cells [J]. ACS Applied Materials & Interfaces, 2016, 8(33):21505–21511.
[7] Hu R, Chu L, Zhang J, et al. Carbon Materials for Enhancing Charge Transport in the Advancements of Perovskite Solar Cells [J]. Power Sources, 2017, 361: 259-275.
[8] Richard L, McCreery. ChemInform Abstract: Advanced Carbon Electrode Materials for Molecular Electrochemistry [J]. Cheminform , 2010, 39(41).
[9] Laban W A, Etgar L. Depleted Hole Conductor-free Lead Halide Iodide Heterojunction Solar Cells [J]. Energy and Environmental Science, 2013, 6(11): 3249-3253.
[10] Marchioro A, Teuscher J, Friedrich D, et al. Unravelling the Mechanism of Photoinduced Charge Transfer Processes in Lead Iodide Perovskite Solar Cells[J]. Nature Photonics, 2014, 8(3): 250-255.
[11] Ku Z, Rong Y, Xu M, et al. Full Printable Processed Mesoscopic CH3NH3PbI3/TiO2 Heterojunction Solar Cells with Carbon Counter Electrode[J]. Scientific Reports, 2013, 3, 3132-3137.
[12] Mei A Y, Li X, Liu L F, et al. A Hole-conductor-free, Fully Printable Mesoscopic Perovskite Solar Cell with High Stability[J]. Science, 2014, 345(6194): 295-298.
[13] Hu Y, Si S, Mei A, et al. Stable Large-Area Printable Mesoscopic Perovskite Module Exceeding 10% Efficiency[J]. Solar Rrl, 2017, 1(2):1600019-1600025.
[14] Yang Y Y, Xiao J Y, Wei H Y, et al. An All-carbon Counter Electrode for Highly Efficient Hole-conductor-free Organo-metal Perovskite Solar Cells [J]. RSC Advances, 2014, 4(95):52825-52830.
[15] Zhang L J, Liu T F, Liu L F, et al. The Effect of Carbon Counter Electrodes on Fully Printable Mesoscopic Perovskite Solar Cells[J]. Journal of Materials Chemistry A Materials for Energy & Sustainability, 2015, 3(17): 9165-9170.
[16] Liu Z Y, Zhong Y, Sun B, et al. Novel Integration of Perovskite Solar Cell and Supercapacitor based on Carbon Electrode for Hybridizing Energy Conversion and Storage[J]. Acs Applied Materials & Interfaces, 2017, 9(27): 22361–22368.
[17] Duan M, Rong Y G, Mei A Y, et al. Efficient Hole-conductor-free, Fully Printable Mesoscopic Perovskite Solar Cells with Carbon Electrode Based on Ultrathin Graphite[J]. Carbon, 2017, 120:71-76.
[18] Tian C B, Mei A Y, Zhang S J, et al. Oxygen Management in Carbon Electrode for High-performance Printable Perovskite Solar Cells[J]. Nano Energy, 2018, 53: 160-167.
[19] Hu R Y, Zhang R, Ma Y H, et al. Enhanced Hole Transfer in Hole-conductor-free Perovskite Solar Cells via Incorporating CuS into Carbon Electrodes[J]. Applied Surface Science, 2018, 462(31):840-846.
[20] Bhandari S, Roy A, Ghosh A, et al. Performance of WO3 Incorporated Carbon Electrodes for Ambient Mesoscopic Perovskite Solar Cells [J]. ACS Omega, 2020, 1(5): 422-429
[21] He S S, Qiu L B, Son D Y, et al. Carbon-Based Electrode Engineering Boosts the Efficiency of All Low-Temperature-Processed Perovskite Solar Cells[J]. ACS Energy Letters, 2019, 4(9): 2032-2039.
[22] Yan J Q, Lin S Y, Qiu X C, et al. Accelerated Hole-extraction in Carbon-electrode Based Planar Perovskite Solar Cells by Moisture-assisted Post-annealing[J]. Applied Physics Letters, 2019, 114(10): 103503
[23] Mishra A, Ahmad Z, Zimmermann I, et al. Effect of Annealing Temperature on the Performance of Printable Carbon Electrodes forPerovskite Solar Cells[J]. Organic Electronics, 2019, 65: 375-380.
[24] Li Z, Kulkarni S A, Boix P P, et al. Laminated Carbon Nanotube Networks for Metal Electrode-Free Efficient Perovskite Solar Cells [J]. ACS Nano, 2014, 8(7):6797-6804.
[25] Wang X Y, Li Z, Xu W J, et al. TiO2 Nanotube Arrays Based Flexible Perovskite Solar Cells with Transparent Carbon Nanotube Electrode [J]. Nano Energy, 2015, 11:728-735.
[26] Li H, Cao K, Cui J, et al. 14.7% Efficient Mesoscopic Perovskite Solar Cells Using Single Walled Carbon Nanotubes/Carbon Composite Counter Electrode[J]. Nanoscale, 2016, 8(12): 6379-6385.
[27] Luo Q, Ma H, Zhang Y, et al. Cross-stacked Superaligned Carbon Nanotube Electrodes for Efficient Hole Conductor-free Perovskite Solar Cells[J].Journal of Materials Chemistry A, 2016, 4(15): 5569-5577.
[28] Zheng X L, Chen H N, Li Q, et al. Boron Doping of Multiwalled Carbon Nanotubes Significantly Enhances Hole Extraction in Carbon-Based Perovskite Solar Cells[J]. Nano Letters, 2017, 17(4):2496-2505.
[29] Aitola K, Domanski K, Correa-Baena J P, et al. High Temperature-Stable Perovskite Solar Cell Based on Low-Cost Carbon Nanotube Hole Contact[J].Advanced Materials, 2017, 29(17):1606398.1-1606398.5.
[30] Gopi CV VM, Venkata-Haritha M, Prabakar K, et al. Low-temperature Easy-processed Carbon Nanotube Contact for High-performance Metal- and Hole-transporting Layer-free Perovskite Solar Cells[J]. Journal of Photochemistry and Photobiology A-chemistry, 2017, 332: 265-272.
[31] Yang Y L, Chen H N, Zheng X L, et al. Ultrasound-spray Deposition of Multi-Walled Carbon Nanotubes on NiO Nanoparticles-embedded Perovskite Layers for High-performance Carbon-based Perovskite Solar Cells[J]. Nano Energy, 2017, 42: ?322-333.
[32] Liu S S, Cao K, Hao L, et al. Full Printable Perovskite Solar Cells Based on Mesoscopic TiO2/Al2O3/NiO (Carbon Nanotubes) Architecture[J]. Solar Energy, 2017, 144:158-165.
[33] Hu R Y, Zhang R, Ma Y H, et al. Enhanced Hole Transfer in Hole-conductor-free Perovskite Solar Cells via Incorporating CuS into Carbon Electrodes[J]. Applied Surface Science, 2018, 462(31): 840-846.
[34] Zhou Y, Yin X W, Luo Q, et al. Efficiently Improving the Stability of Inverted Perovskite Solar Cells by Employing Polyethylenimine-Modified Carbon Nanotubes as Electrodes[J]. ACS Applied Materials & Interfaces, 2018, 10(37): 31384-31393.
[35] Siram R B K, Khenkin M V, Niazov-Elkan A, et al. Hybrid Organic Nanocrystal/carbon nanotube Film Electrodes for Air- and Photo-stable Perovskite Photovoltaics[J]. Nanoscale, 2019, 11(8):3733-3740.
[36] Chen J, Chen T, Xu T, et al. MAPbI3 Self-Recrystallization Induced Performance Improvement for Oxygen-Containing Functional Groups Decorated Carbon Nanotube-Based Perovskite Solar Cells[J]. Solar Rrl, 2019, 3(12):197012.
[37] Guo M X, Liu J Q, Yuan Y Y, et al. CNTs/Cf Based Counter Electrode for Hihgly Efficient Hole-transport-material-free Perovskite Solar Cells[J]. Journal of Photochemistry & Photobiology, A: Chemistry, 2020, 403:112843.
[38] Zhang F Q, Yang X C, Wang H X, et al. Structure Engineering of Hole–Conductor Free Perovskite-Based Solar Cells with Low-Temperature-Processed Commercial Carbon Paste As Cathode[J]. ACS Applied Materials & Interfaces, 2014, 6(18): 16140-16146.
[39] Zhou H W, Shi Y T, Dong Q S, et al. Hole-Conductor-Free, Metal-Electrode-Free TiO2/CH3NH3PbI3 Heterojunction Solar Cells Based on a Low-Temperature Carbon Electrode [J]. Journal of Physical Chemistry Letters, 2014, 5(18): 3241-3246.
[40] Zhou H W, Shi Y T, Wang K, et al. Low-Temperature Processed and Carbon-Based ZnO/CH(3)NH(3)Pbl(3)/C Planar Heterojunction Perovskite Solar Cells[J]. Journal of Physical Chemistry C, 2015, 119(9):150216032236005.
[41] Qiang Y, Cheng J, Qi Y, et al. Low-temperature preparation of HTM-free SnO2-based Planar Heterojunction Perovskite Solar Cells with Commercial Carbon as Counter Electrode[J]. Journal of Alloys and Compounds, 2019, 809:UNSP 151817.
[42] Han J H, Yin X W, Zhou Y, et al. High Efficient Large-area Perovskite Solar Cells Based on Paintable Carbon Electrode with NiO Nanocrystal-carbon Intermediate Layer[J]. Chemistry Letters, 2019, 48(7): 734-737.
[43] Zhou X, Wang Y Y, Li C Y, et al. Doping Amino-functionalized Ionic Liquid in Perovskite Crystal for Enhancing Performances of Hole-conductor Free Solar Cells with Carbon Electrode[J]. Chemical Engineering Journal, 2019, 372: 46-52.
[44] Zong B B, Fu W Y, Guo Z A, et al. Highly Stable Hole-conductor-free Perovskite Solar Cells Based upon Ammonium Chloride and a Carbon Electrode[J]. Journal of Colloid and Interface Science, 2019, 540: 315-321.
[45] Yang M, Li J, Li J H, et al. High Efficient and Long-time Stable Planar Heterojunction Perovskite Solar Cells with Doctor-bladed Carbon Electrode[J]. Journal of Power Sources, 2019, 424:61-67.
[46] Wang S W, Liu H J, Bala H, et al. A Highly Stable Hole-conductor-free Cs(x)MA(1-x)PbI(3) Perovskite Solar Cell Based on Carbon Counter Electrode[J]. Electrochimica Acta, 2020, 335:135686.
[47] Sung H, Ahn N, Jang M S, et al. Transparent Conductive Oxide-Free Graphene-Based Perovskite Solar Cells with over 17% Efficiency[J]. Advanced Energy Materials, 2016, 6(3): 1501873.
[48] Yan K Y, Wei Z H, Li J K, et al. High‐Performance Graphene‐Based Hole Conductor‐Free Perovskite Solar Cells: Schottky Junction Enhanced Hole Extraction and Electron Blocking[J]. Small, 2015, 11(19): 2269-2274.
[49] Wei W, Hu B, Jin F, et al. Potassium-chemical synthesis of 3D graphene from CO2 and its excellent performance in HTM-free perovskite solar cells[J]. Journal of Materials Chemistry A, 2017, 5(17): 7749-7752.
[50] Wei Z H, Yan K Y, Chen H N, et al. Cost-efficient Clamping Solar Cells Using Candle Soot for Hole Extraction from Ambipolar Perovskites[J]. Energy & Environmental Science,2014, 7(10):3326-3333.
[51] Gholipour S, Correa-Baena J P, Domanski K, et al. Highly Efficient and Stable Perovskite Solar Cells based on a Low-Cost Carbon Cloth[J]. Advanced Energy Materials, 2016, 6(20): 1601116.
[52] Singh R, Jun H K, Arof A K. Activated Carbon as Back Contact for HTM-free Mixed Cation Perovskite Solar Cell[J]. Phase Transitions, 2018, 91(12): 1268-1276.
[53] Sajid S, Elseman A M, Wei D, et al. NiO@Carbon Spheres: A Promising Composite Electrode for Scalable Fabrication of Planar Perovskite Solar Cells at Low Cost[J]. Nano Energy, 2019, 55: ? 470-476
[54] Mali S S, Kim H, Patil J V, et al. Bio-inspired Carbon Hole Transporting Layer Derived from Aloe Vera Plant for Cost-effective Fully Printable Mesoscopic Carbon Perovskite Solar Cells[J]. ACS Applied Materials & Interfaces, 2018, 10(37): ? 31280-31290
[55] Meng F N, Gao L G, Yan Y L, et al. Ultra-low-cost Coal-based Carbon Electrodes with Seamless Interfacial Contact for Effective Sandwich-structured Perovskite Solar Cells[J]. Carbon, 2020:145: 290-296.
[56] Gao L G, Zhou Y, Meng F N, et al. Several Economical and Eco-friendly Bio-carbon Electrodes for Highly Efficient Perovskite Solar Cells[J]. Carbon, 2020, 162: 267-272.
[57] Pitchaiya S, Eswaramoorthy N, Natarajan M, et al. Perovskite Solar Cells: A Porous Graphitic Carbon based Hole Transporter/Counter Electrode Material Extracted from an Invasive Plant Species Eichhornia Crassipes[J]. Scientific Reports, 2020, 10(1): 6835.