Iodide-reduced graphene oxide with dopant-free spiro-OMeTAD for ambient stable and high-efficiency perovskite solar cells

Luo, Qi; Zhang, Ye; Liu, Chengyang; Li, Jianbao; Wang, Ning; Lin, Hong

doi:10.1039/c5ta02710a

Cited by 136 publications

(96 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Apart graphene, other 2D crystals, such as chemically modified graphene [e.g., graphene oxide (GO) [49] and reduced graphene oxide (RGO)], [50] or inorganic 2D crystals, [47] such as transition metal dichalcogenides or transition metal oxides, offering complementary (opto)electronic properties to graphene, [47] are also promising interface materials. [57] This permits to use GRMs, in the graphene-based oxidized form (GO or RGO), as dopant [58][59][60] and as interlayer, [61,62] with the aim to enhancec harge injection at the counter electrode. [55,56] GRMs are very versatile, offering ap ossibility to control the bandgap andb and alignment through chemical functionalization and edge modification.…”

Section: Introductionmentioning

confidence: 99%

Graphene–Perovskite Solar Cells Exceed 18 % Efficiency: A Stability Study

et al. 2016

View full text Add to dashboard Cite

Interface engineering is performed by the addition of graphene and related 2 D materials (GRMs) into perovskite solar cells (PSCs), leading to improvements in the power conversion efficiency (PCE). By doping the mesoporous TiO layer with graphene flakes (mTiO +G), produced by liquid-phase exfoliation of pristine graphite, and by inserting graphene oxide (GO) as an interlayer between the perovskite and hole-transport layers, using a two-step deposition procedure in air, we achieved a PCE of 18.2 %. The obtained PCE value mainly results from improved charge-carrier injection/collection with respect to conventional PSCs. Although the addition of GRMs does not influence the shelf life, it is beneficial for the stability of PSCs under several aging conditions. In particular, mTiO +G PSCs retain more than 88 % of the initial PCE after 16 h of prolonged 1 sun illumination at the maximum power point. Moreover, when subjected to prolonged heating at 60 °C, the GO-based structures show enhanced stability with respect to mTiO +G PSCs, as a result of thermally induced modification at the mTiO +G/perovskite interface. The exploitation of GRMs in the form of dispersions and inks opens the way for scalable large-area production, advancing the possible commercialization of PSCs.

show abstract

Section: Introductionmentioning

confidence: 99%

Graphene–Perovskite Solar Cells Exceed 18 % Efficiency: A Stability Study

et al. 2016

View full text Add to dashboard Cite

show abstract

“…A reasonable speculation was proposed that the absence of HTM and the utilization of thermally conductive carbon materials can help dissipate the internal heat of the device. Therefore, transferring the internal heat to outside of device will be an effective way to solve the thermal instability of MAPbI3 material and device, using materials with high heat transmission coefficient such as graphene [40,41].…”

Section: Thermal Stabilitymentioning

confidence: 99%

Stability Issues on Perovskite Solar Cells

2015

View full text Add to dashboard Cite

Organo lead halide perovskite materials like methylammonium lead iodide (CH3NH3PbI3) and formamidinium lead iodide (HC(NH2)2PbI3) show superb opto-electronic properties. Based on these perovskite light absorbers, power conversion efficiencies of the perovskite solar cells employing hole transporting layers have increased from 9.7% to 20.1% within just three years. Thus, it is apparent that perovskite solar cell is a promising next generation photovoltaic technology. However, the unstable nature of perovskite was observed when exposing it to continuous illumination, moisture and high temperature, impeding the commercial development in the long run and thus becoming the main issue that needs to be solved urgently. Here, we discuss the factors affecting instability of perovskite and give some perspectives about further enhancement of stability of perovskite solar cell.

show abstract

“…Figure 4a shows the current densityvoltage (J-V) curves of those PSCs. [14] The PSCs based on RGO/CZTS 0.5 Se 0.5 shows good long-term stabilities at room temperature. The photovoltaic parameters are summarized in Table 1.…”

Section: Resultsmentioning

confidence: 95%

“…[8][9] As unique two-dimensional (2D) carbon materials, graphene and their derivatives have attracted great attention due to their excellent electrical conductivity and mechanical property, which have already shown great potential in PSCs. [14] Improving the surface coverage of RGO and the charge extraction efficiency becomes a great challenge to apply RGO and its composites as HTMs in efficient PSCs. [13] However, RGO was found to be poor efficiency to extract the holes from perovskite layer, mainly due to the uncompleted coverage on the perovskite surface.…”

Section: Introductionmentioning

confidence: 99%

Reduced Graphene Oxide/CZTS_xSe_1‐x Composites as a Novel Hole‐Transport Functional Layer in Perovskite Solar Cells

Han

Yin

et al. 2019

ChemElectroChem

Self Cite

View full text Add to dashboard Cite

Exploiting lower cost and more stable hole-transport materials to replace spiro-OMeTAD is a hot topic in the research field of perovskite solar cells (PSCs). This work exploits a novel holetransport composite containing reduced graphene oxides (RGO) and Cu 2 ZnSn(SSe) 4 (CZTS x Se 1-x ) by a green sol-gel method for efficient perovskite solar cells. The composition and crystalline structure of CZTS x Se 1-x were examined by Raman and X-ray photoelectron spectroscopy as well as by X-ray diffraction measurements. Compared with a pristine RGO hole-transport layer (HTL), the PSC with RGO/CZTS x Se 1-x composite shows an improved photovoltaic performance and enhanced stability. A maximum power conversion efficiency (PCE) of 10.08 % and an enhanced stability were obtained for the cell with the RGO/ CZTS 0.5 Se 0.5 composite. Moreover, only 14 % efficiency reduction ratio was observed for the device stored in air at room temperature after 500 hours without encapsulation. In addition, the different S/Se ratios of CZTS x Se 1-x showed distinct photovoltaic properties of the PSCs, which is attributed to the change of energetic structures, confirmed by electrochemical characterizations.

show abstract

Iodide-reduced graphene oxide with dopant-free spiro-OMeTAD for ambient stable and high-efficiency perovskite solar cells

Abstract: A p-type and highly conductive reduced graphene oxide combined with dopant-free spiro-OMeTAD as a hole transport layer improves the stability of perovskite solar cells.

Cited by 136 publications

References 44 publications

Graphene–Perovskite Solar Cells Exceed 18 % Efficiency: A Stability Study

Graphene–Perovskite Solar Cells Exceed 18 % Efficiency: A Stability Study

Stability Issues on Perovskite Solar Cells

Reduced Graphene Oxide/CZTS_xSe_1‐x Composites as a Novel Hole‐Transport Functional Layer in Perovskite Solar Cells

Contact Info

Product

Resources

About

Iodide-reduced graphene oxide with dopant-free spiro-OMeTAD for ambient stable and high-efficiency perovskite solar cells

Abstract: A p-type and highly conductive reduced graphene oxide combined with dopant-free spiro-OMeTAD as a hole transport layer improves the stability of perovskite solar cells.

Cited by 136 publications

References 44 publications

Graphene–Perovskite Solar Cells Exceed 18 % Efficiency: A Stability Study

Graphene–Perovskite Solar Cells Exceed 18 % Efficiency: A Stability Study

Stability Issues on Perovskite Solar Cells

Reduced Graphene Oxide/CZTSxSe1‐x Composites as a Novel Hole‐Transport Functional Layer in Perovskite Solar Cells

Contact Info

Product

Resources

About

Reduced Graphene Oxide/CZTS_xSe_1‐x Composites as a Novel Hole‐Transport Functional Layer in Perovskite Solar Cells