Tin based halide perovskites have drawn attention in the last years because of their unique combination of interesting physical properties and low toxicity, showing a great potential for solar cells, photodetectors, sensors, lasers, and light emitting diodes applications ^[1,7]. However, the development of electronic devices has been hindered, in part, for the poor stability of Sn (II) against atmospheric conditions (moisture and oxygen) ^[2]. Currently, 2D- hybrid perovskite materials were proposed to overcome these issues owing to the hydrophobic nature of large organic cations, isolating tin halide octahedrons from the moisture ^[3]. Among the organic cations that have been tested for 2D perovskite structures, 2- thiophene ethyl ammonium tin (II) iodide (TEA₂SnI₄) perovskite has shown high exciton energy binding, and low exciton- phonon interactions ^[4]. Although there are some published papers about TEA₂SnI₄ thin films ^[5] and nanoplates^[6,8], the development of nano- and microcrystals have been limited due to fast crystallization rate of tin-based perovskites and stability issues ^[7]. Moreover, in the literature there are few optical and structural information about TEA₂SnBr₄ and TEA₂SnCl₄. In this work we report by first time the synthesis of TEA₂SnX₄ (X= Cl, Br, I) microcrystals by mean of hot injection method. We observed that the optical and structural properties of TEA₂SnX₄ (X= Cl, Br, I) microcrystals are dependent of the molar ratio of 2-thiophene ethyl amine and SnX₂-Trioctyl phosphine (TOP) precursor solutions. In all of cases we observe a X ray diffraction pattern characterized for strong (00l; l= 2,4,6 and 8) reflections which is consistent with the quantum well like structure of 2D hybrid tin halide perovskites. However, for the synthesis of TEA₂SnBr₄ microcrystals, d- spacing decrease from 1.8658 nm to 1.5782 nm when the rTEA/Sn molar ratio of TEA/Sn(II) precursors decrease from 2 to 0.25. We hypothesized that at high r_TEA/Sn, TEA molecules might dimerize by oxidative polymerization reaction, obtaining a long chain diammonium cation between [SnBr₆]^4- sheets. Evidence from ¹³ C nuclear magnetic resonance experiments might confirm this mechanism. TEA₂SnCl₄ and TEA₂SnBr₄ show a photoluminescence spectrum characterized by a broad band emission centred at 595 nm and 608 nm respectively. Owing to the Stoke shift between PL excitation and emission spectra of TEA₂SnCl₄ and TEA₂SnBr₄ are 318 nm and 335 nm, PL emission of this materials might be related to self- confined excitons. In the case of TEA₂SnI₄ microcrystals, PL emission and excitation spectra is equal to previous works ^[6,8], represented by a sharp band emission centred at 641 nm with a FWHM = 40 nm, and a low PLQY = 1%. We measured a high PLQY= 50% for TEA₂SnBr₄ microcrystals and PLQY= 20% for TEA₂SnCl₄ microcrystals synthesized at a high molar ratio of TEA/Sn (II) of 2. By first time, we have also demonstrated photoconductivity effect for TEA₂SnI₄ films containing microcrystals synthesized with a molar ratio TEA/Sn(II)= 0.5.